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About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing: You will lead Helion’s R&D Materials Science team with a strong focus on developing and deploying critical capabilities that enable the design, testing, and monitoring of materials for extreme environments. You will oversee the delivery of key R&D tools and guide a team of subject matter experts to meet Helion’s materials innovation goals. This is an onsite role that reports directly to Director of Materials Science at our Everett, WA office. You Will: Lead, develop, and support subject matter experts driving the development and deployment of new lab infrastructure, driving materials monitoring technologies and developing predictive models to extend material performance and reliability Own and manage the delivery of Helion’s R&D materials needs such as implementation of equipment and methodology to condition materials including an ion beam and H/He implantation, development of in-situ materials monitoring techniques to optimize operational conditions that lengthen materials service life, and development of data models to quantify impact of radiation on materials’ health Translate annual goals into objective tasks and manage month-to-month planning towards completing goals and objectives. Drive schedule ownership to accelerate the completion of milestones Build and manage a network of collaborative relationships, both internally and externally, to develop new materials that can survive a fusion environment Required Skills: Experience with data-driven Multiphysics modeling including knowledge of MATLAB, COMSOL, and/or Python Experience setting up large infrastructure and complex equipment Deep knowledge of NDT (Non-Destructive Testing) technologies to monitor materials integrity The ideal candidate would have a bias for action, know how to organize the team to execute with urgency, and favor learning through rapid prototyping Experience (i) managing an R&D team that delivered a high-impact final product, (ii) expanding a talent-dense team via a hiring process, and (iii) owning the schedule for a critical path facet of a milestone project Successful and autonomous mentorship of employees of a wide range of expertise, experience, and backgrounds, demonstrated e.g., via several performance review cycles and successful coaching of direct reports Fluent in some people management systems (e.g., recruiting, timecard management, spend approval, and performance reviews) and applying company policies as described in an employee handbook #LI-TM1 #LI-Onsite Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $144,000 — $217,000 USD Benefits Our total compensation package includes benefits, including but not limited to: Medical, Dental, and Vision plans for employees and their families 31 Days of PTO (21 vacation days and 10 sick days) 10 Paid holidays, plus company-wide winter break Up to 5% employer 401(k) match Short term disability, long term disability, and life insurance Paid parental leave and support (up to 16 weeks) Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing: You will lead Helion’s Accounts Payable function, ensure timely, accurate, and compliant vendor payments, while building scalable processes that can keep pace with a rapidly growing company. You will report to the Controller, and this is an onsite role at our Everett, WA office. You Will: Manage the full Accounts Payable lifecycle, from invoice processing and payment execution to reporting and controls Develop and lead AP team that supports Helion’s operations Collaborate across Supply Chain, Inventory Management, and Receiving to resolve issues and improve workflow efficiency Oversee Helion’s corporate credit card and travel & expense programs, including policy development and system administration in Ramp Drive continuous improvement through process optimization, system enhancements, and KPI reporting in partnership with the Controller and CFO Support external financial audits and ensure compliance with internal controls and tax requirements, including annual 1099 filings Required Skills: 8+ years of progressive Accounts Payable experience, including 3+ years in a management role Proven success leading AP functions in high-growth, technology-driven environments Hands-on experience with Tipalti and/or Ramp, including process design and optimization Strong understanding of US GAAP, internal controls, and spend management best practices Experience preparing and reviewing journal entries, account reconciliations, and cash forecasts #LI-Onsite Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $110,000 — $140,000 USD Benefits Our total compensation package includes benefits, including but not limited to: Medical, Dental, and Vision plans for employees and their families 31 Days of PTO (21 vacation days and 10 sick days) 10 Paid holidays, plus company-wide winter break Up to 5% employer 401(k) match Short term disability, long term disability, and life insurance Paid parental leave and support (up to 16 weeks) Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group and new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). Now, we're turning up operations for Polaris, working towards delivering the world's first fusion power plant.  More than ever, it's a pivotal time to join us and have the opportunity to solve real challenges to create a better energy future. You will see first-hand how we value urgency, rigor, ownership, and hard truths, knowing it will take each to do what no one has before. Joining us, you will push the boundaries of what's possible and transform humanity for the better - because the world can't wait. What You Will Be Doing: You will own the development of capacitor manufacturing processes used for energy storage in Helion’s fusion generators. The position provides a unique opportunity to develop in-house expertise on all aspects of capacitor manufacturing. You will accelerate Helion’s transition from rapid prototyping to generator mass manufacturing, delivering on Helion’s mission of providing clean electricity for the planet. This is an onsite role that reports directly to the Senior Manager of Manufacturing at our Everett, WA office. You Will: You will own capacitor manufacturing processes and collaborate with stakeholders to develop and improve existing and new processes Working across technical teams to deeply understand how capacitors are used within our pulsed power circuits to optimize capacitor manufacturing process for Helion’s top-level generator goals Develop in-depth technical understanding of capacitor manufacturing processes Conduct Design of Experiments (DoE) and perform statistical analysis to make data-driven decisions for novel manufacturing techniques Utilize process improvement techniques (Lean, Six Sigma, SPC etc.) to optimize manufacturing processes Collect process data and build analysis tools to notify operations teams on process health and Key Performance Indicators (KPI) Partner with Design teams to iterate on design and improve Design for Manufacturability Support integration of our factory MES system with automated manufacturing equipment Develop manufacturing documentation including but not limited to work instructions, equipment data sheets, troubleshooting guides, controls narratives etc Support commissioning activities of new manufacturing equipment and lines Troubleshoot down equipment, establish root cause and implement solutions to prevent reoccurrence  Required Skills: You have a bachelor’s degree in engineering with a minimum of 3 years of manufacturing experience, and a love of rapid execution and hard problems High volume manufacturing experience Hands-on engineering experience in scaling throughput or rate of a manufacturing line Ability to apply physics based first principles to challenge design requirements and assumptions Experience communicating with and influencing partners across organizational lines Exceptional communication and successful partnership with supply chain and production teams #LI-ONSITE #LI-AM1 Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $150,000 — $200,000 USD Benefits Our total compensation package includes benefits, including but not limited to:  •    Medical, Dental, and Vision plans for employees and their families  •    31 Days of PTO (21 vacation days and 10 sick days)  •    10 Paid holidays, plus company-wide winter break  •    Up to 5% employer 401(k) match  •    Short term disability, long term disability, and life insurance  •    Paid parental leave and support (up to 16 weeks)  •    Annual wellness stipend   Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group and new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). Now, we're turning up operations for Polaris, working towards delivering the world's first fusion power plant.  More than ever, it's a pivotal time to join us and have the opportunity to solve real challenges to create a better energy future. You will see first-hand how we value urgency, rigor, ownership, and hard truths, knowing it will take each to do what no one has before. Joining us, you will push the boundaries of what's possible and transform humanity for the better - because the world can't wait. What You Will Be Doing:   Helion is hiring an entry-level Mechanical Engineer to oversee hardware designs for Helion's fusion generator prototypes. You will help solve versatile engineering problems that are important to deploying fusion energy to the world, and be a culture-driver on a small but expanding team. You will report directly to a Mechanical Engineering Manager at our Everett, WA office.     You Will:   Own and understand subsystem designs such as electromagnetic, structural, fluid, thermal, and control systems, and improve their requirements Learn from historical engineering approaches, design novel hardware, test your solutions, and integrate them into our fusion devices Apply both engineering first-principles and method-based thinking to challenging problems Use 3D CAD software (e.g., NX, Solidworks) to design fusion hardware Perform analysis with tools like ANSYS and hold design reviews to gather feedback and iterate to a fully functioning system Learn from experts to expand your engineering skillset and domain knowledge Work hands-on alongside experienced technicians to improve your hardware designs Fix hardware issues as they arise on integrated fusion generators   Required Skills:   1-2 years of collegiate internship or project team experience (e.g. SAE, Rocket Club) that includes working with versatile teams managing complex engineering projects and schedules Bachelor's degree in engineering Hands-on exposure to a variety of engineering disciplines (mechanical, electrical, fluids) Experience with 3D CAD software (e.g. NX, Solidworks) and GD&T   #LI-Onsite #LI-MT1 Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $90,000 — $108,000 USD Benefits Our total compensation package includes benefits, including but not limited to:  •    Medical, Dental, and Vision plans for employees and their families  •    31 Days of PTO (21 vacation days and 10 sick days)  •    10 Paid holidays, plus company-wide winter break  •    Up to 5% employer 401(k) match  •    Short term disability, long term disability, and life insurance  •    Paid parental leave and support (up to 16 weeks)  •    Annual wellness stipend   Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing: This role will be pivotal in scaling Helion's internal communications programs, with ownership of key storytelling and communication mechanisms that keep our growing team aligned and engaged across every site and shift. You'll partner with Production and Manufacturing leaders to surface stories, support team-wide events, and write announcements and updates. Every day will look different, but your north star will be clarity and connection for our team of builders. This is an onsite role that reports directly to the Internal Communications Lead at our Everett, WA office. You Will: Plan, develop, and deliver of recurring internal communications, including newsletter features, team presentations, digital signage, and leader announcements Strategize and support the execution of high-priority internal campaigns and events, including delivery of key topics at company-wide Town Halls Partner with our Production and Manufacturing leaders to drive team engagement and alignment through existing channels (Technician All Hands), identifying new or evolving mechanisms to keep technicians connected across shifts Manage intranet content / company wiki pages, working alongside documentation owners and SMEs to ensure published information is maintained as the single source of truth Work with IS&T and People Ops to optimize the company's user groups (levels, teams, site locations) across company channels (distribution lists, Slack) to ensure the right messages reach the right employees Required Skills: 5+ years of experience in internal communications, or employee engagement—ideally in a high-growth, manufacturing or hardware engineering environment Track record of strong partnerships across all levels of an organization—from senior leaders to individual subject matter experts—to deliver communications plans that drive team alignment and engagement Exceptional writing and editing skills, with a knack for tailoring key messages across multiple formats, diverse audiences and range of channels like email, Slack, Confluence and digital signage Experience translating complex manufacturing or engineering topics into clear, compelling communications Success driving projects with strong organization, attention to detail, and end-to-end ownership of storytelling #LI-Onsite #LI-MM1 Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $88,000 — $118,000 USD Benefits Our total compensation package includes benefits, including but not limited to: Medical, Dental, and Vision plans for employees and their families 31 Days of PTO (21 vacation days and 10 sick days) 10 Paid holidays, plus company-wide winter break Up to 5% employer 401(k) match Short term disability, long term disability, and life insurance Paid parental leave and support (up to 16 weeks) Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing: You will lead the Conductive Materials Science team, bringing together expertise in new materials design, analytical engineering, prototyping, and scale-up. In this role, you will guide the development of advanced inorganic materials for extreme environments, aligning cross-disciplinary efforts to deliver reliable, high-performance solutions that support Helion’s mission. This is an onsite role that reports directly to Director of the Materials Science at our Everett, WA office. Lead, develop, and support subject matter experts driving the development and scale-up of advanced conductive materials engineered for extreme environments, including elevated temperature and radiation exposure Own and manage the delivery of Helion’s conductive materials needs such as magnets, structural elements, and capacitors Translate annual goals into objective tasks and manage month-to-month planning towards completing goals and objectives. Drive schedule ownership to accelerate the completion of milestones Build and manage a network of collaborative relationships, both internally and externally, to develop new materials that can survive a fusion environment Minimum Required Skills: Experience with developing new metals, alloys, and multi-metal microstructure from ideation to launch Experience or deep knowledge of metal processes including casting, forging, machining, grinding, and milling Hands-on experience in analytical equipment to characterize metals properties including structural, mechanical, thermal, and electrical properties (e.g., metallograph, XRD, SEM, TEM, TGA/DSC, ICP-MS, Fatigue tests, flexural, and tensile tests) The ideal candidate would have a bias for action, know how to organize the team to execute with urgency, and favor learning through rapid prototyping Experience (i) managing a materials science team that delivered a high-impact final product, (ii) expanding a talent-dense team via a hiring process, and (iii) owning the schedule for a critical path facet of a milestone project Successful and autonomous mentorship of employees of a wide range of expertise, experience, and backgrounds, demonstrated e.g., via several performance review cycles and successful coaching of direct reports Fluent in some people management systems (e.g., recruiting, timecard management, spend approval, and performance reviews) and applying company policies as described in an employee handbook #LI-TM1 #LI-Onsite Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $160,000 — $206,000 USD Benefits Our total compensation package includes benefits, including but not limited to: Medical, Dental, and Vision plans for employees and their families 31 Days of PTO (21 vacation days and 10 sick days) 10 Paid holidays, plus company-wide winter break Up to 5% employer 401(k) match Short term disability, long term disability, and life insurance Paid parental leave and support (up to 16 weeks) Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing: The Inventory Control Supervisor oversees all warehouse and material control functions to ensure accurate inventory, efficient material flow, and seamless support to production. This role leads a team of material handlers, driving accountability, continuous improvement, and operational excellence across receiving, storage, and replenishment activities. This is an onsite role, and you will report directly to the Inventory Control Manager at our Everett WA location. You Will: Oversee daily operations of material handlers, providing coaching and direction to meet performance, quality, and safety standards Implement and monitor cycle counts, investigate discrepancies, and drive corrective actions to sustain inventory reliability Manage daily receipt and storage of incoming materials ensuring all items are inspected and recorded Coordinate prompt delivery of materials to production lines, minimizing downtime and ensuring warehouse, production, and materials management teams are aligned Standardize workflows for receiving, put-away, and replenishment, identifying opportunities to enhance efficiency, traceability, and data integrity Required Qualifications 3+ years of experience in inventory control, materials management, or warehouse operations Leadership experience overseeing or developing warehouse teams Working knowledge of ERP or WMS systems and data-driven inventory management Experience collaborating effectively across departments Skilled in managing stock levels, executing cycle counts, and resolving discrepancies in dynamic production environments #LI-Onsite Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $100,000 — $120,000 USD Benefits Our total compensation package includes benefits, including but not limited to: Medical, Dental, and Vision plans for employees and their families 31 Days of PTO (21 vacation days and 10 sick days) 10 Paid holidays, plus company-wide winter break Up to 5% employer 401(k) match Short term disability, long term disability, and life insurance Paid parental leave and support (up to 16 weeks) Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing: We are hiring a Principal Power Electronics Engineer to support the core energy management systems that power Helion’s fusion generators. Your work will focus on high-power electrical systems including energy delivery to pulsed magnetics, energy recovery systems, internal redistribution networks, and grid-tie infrastructure. You will design, commission, and optimize systems that are foundational to delivering clean, low-cost electricity to the world. This is an onsite role that reports directly to Manager of Electrical Engineering at our Everett, WA office. You Will: Design, test, troubleshoot, and support high-voltage power systems for pulsed magnetic coils Oversee design, procurement, construction, and commissioning of systems delivering Develop system architectures and collaborate with designers on schematics and installation drawings Lead design reviews to validate cost-effective, scalable, and reliable solutions Support commissioning and lifetime operation of generator power systems, identifying paths to optimize future builds Apply rigorous engineering practices, including ownership of cost, schedule, and resource planning for assigned projects Mentor electrical engineers and collaborate with cross-functional teams to build technical capability across Helion Required Skills: 12+ years experience in power electronics, solving complex electrical engineering problems from design to delivery Bachelor’s or Master’s degree in Electrical Engineering, Physics, or a related field Hands-on experience designing, fabricating, installing, and testing electronic systems Strong knowledge of solid-state switching technologies and power components such as IGBTs, MOSFETs, and SCRs Technical depth in engineering principles, codes, and practices with experience coordinating deliverables to meet milestones Advanced troubleshooting skills with standard benchtop tools (oscilloscopes, E-loads, pulse generators, spectrum analyzers) and PCB design software Proficiency with tools such as Microsoft Office, LTSpice, SIMetrix/SIMPLIS, Altium, and MATLAB #LI-Onsite #LI-KL1 Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $185,000 — $250,000 USD Benefits Our total compensation package includes benefits, including but not limited to: Medical, Dental, and Vision plans for employees and their families 31 Days of PTO (21 vacation days and 10 sick days) 10 Paid holidays, plus company-wide winter break Up to 5% employer 401(k) match Short term disability, long term disability, and life insurance Paid parental leave and support (up to 16 weeks) Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone.  Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant.  This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing:   You will own the development, implementation, and standardization of automation and controls used in manufacturing Helion’s fusion generators. By building in-house expertise in our manufacturing processes, you will help accelerate the transition from rapid prototyping to mass production—advancing Helion’s mission to provide clean electricity for the planet. This is an onsite role that reports directly to the Senior Manager of Manufacturing at our Everett, WA office.   You Will:   Own Helion’s proprietary testing systems and collaborate with stakeholders to develop and improve both existing and new testing processes; work across technical teams to understand product integration within pulsed power circuits to optimize test processes aligned with Helion’s top-level generator goals   Design, scale, and launch manufacturing equipment for new products being produced for the first time, including the development of automation system architecture and standards for deployment across multiple production lines   Collaborate with machine suppliers on high-level equipment design and functionality; support design reviews, acceptance testing, and equipment buyoff to ensure seamless integration into manufacturing operations   Implement safety systems that comply with ANSI, ISO, and OSHA standards for high-volume manufacturing equipment to ensure operational safety and regulatory adherence   Produce electrical one-line diagrams and schematics for automated manufacturing equipment; support integration with the factory’s Manufacturing Execution System (MES) and set up equipment reporting to track Overall Equipment Effectiveness (OEE) and other critical machine data   Troubleshoot down equipment, identify root causes, and implement long-term solutions to prevent recurrence and ensure sustained manufacturing uptime and efficiency   Required Skills:   Bachelor’s degree in engineering with a minimum of 7 years of experience working with manufacturing controls in high-volume manufacturing environments   Proficient in electrical schematic design and PLC programming using ladder logic, function block, or structured text (e.g., Allen-Bradley, Siemens)   Experienced in programming industrial robots, including systems such as Fanuc and Kuka   Skilled in designing safety systems for automated machines, with relevant experience or qualifications in safety compliance and risk mitigation   Ability to apply physics-based first principles to challenge design requirements and underlying assumptions, driving better engineering outcomes   Strong communication skills with proven success influencing cross-functional partners and building effective partnerships with supply chain and production teams #LI-ONSITE #LI-AM1   Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $160,000 — $196,000 USD Benefits Our total compensation package includes benefits, including but not limited to:  •    Medical, Dental, and Vision plans for employees and their families  •    31 Days of PTO (21 vacation days and 10 sick days)  •    10 Paid holidays, plus company-wide winter break  •    Up to 5% employer 401(k) match  •    Short term disability, long term disability, and life insurance  •    Paid parental leave and support (up to 16 weeks)  •    Annual wellness stipend   Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing: As a Firmware Engineer, you will develop the embedded systems that power the control, diagnostics, and protection layers of our fusion machines. You’ll write and maintain firmware that runs on thousands of distributed embedded devices controlling and monitoring tens of thousands of sensors, actuators, and data channels. This role bridges hardware and software — you’ll work closely with electrical and software engineers to design reliable, scalable, and high-performance control and data acquisition systems. You’ll help define communication protocols, improve time synchronization across embedded networks, and automate hardware bring-up and testing. This position is ideal for an engineer who enjoys working close to the metal, debugging complex systems, and rapidly iterating on real-world hardware to make fusion power a practical reality. This role requires onsite presence, and you will report directly to our Lead Electrical Engineer at our Everett, WA, office. You Will: Develop, test, and maintain firmware for real-time embedded systems used in machine control and diagnostics. Work closely with hardware and software engineers to translate system requirements into embedded designs. Bring up new boards, sensors, and actuators — debugging with oscilloscopes, logic analyzers, and JTAG interfaces. Implement and maintain low-level communication protocols (UART, SPI, I²C, CAN, EtherCAT, etc.). Design and refine embedded command interfaces, configuration utilities, and automated test frameworks. Optimize performance, reliability, and timing synchronization across distributed embedded systems. Contribute to continuous improvement of embedded toolchains, build systems, and test automation. Rapidly prototype novel control and measurement concepts to support new machine architectures. Collaborate across disciplines to ensure firmware integrates seamlessly with high-level software and data systems. Required Skills: BS or higher in Electrical Engineering, Computer Engineering, or Computer Science. 2–5 years of experience developing embedded systems in C, C++, and/or Rust. Experience with real-time MCU development (bare metal or RTOS-based). Strong understanding of digital communication protocols (UART, SPI, I²C). Familiarity with mixed-signal circuit design and debugging using oscilloscopes, DMMs, and logic analyzers. Experience with version control systems (Git). Scripting experience in Python for automation, hardware bring-up, or testing. Solid grasp of embedded systems fundamentals: power, timing, data, and memory budgets. Experience developing and debugging on Linux-based systems. Desired Skills: Experience with Ethernet, EtherCAT, CAN, or other real-time industrial communication protocols. Familiarity with FPGAs, Verilog/VHDL, or soft-core processor design. Experience with time synchronization protocols (PTP/IEEE 1588, White Rabbit, etc). Knowledge of SCADA or PLC systems for large-scale control architectures. Familiarity with test automation frameworks or CI/CD pipelines for firmware. Background in precision sensing, power electronics, or distributed control systems. #LI-Onsite #LI-KL1 Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $114,000 — $160,000 USD Benefits Our total compensation package includes benefits, including but not limited to: Medical, Dental, and Vision plans for employees and their families 31 Days of PTO (21 vacation days and 10 sick days) 10 Paid holidays, plus company-wide winter break Up to 5% employer 401(k) match Short term disability, long term disability, and life insurance Paid parental leave and support (up to 16 weeks) Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone.   Since Helion's founding in 2013, we have raised over $600 million from investors such as Sam Altman, Mithril, and Capricorn Investment Group to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV).   Now we are working toward Polaris, which will be the first machine to demonstrate electricity from fusion, making this a great time to join Helion! Bring your skills, experiences, and determination to make a difference in the world. Together, we can make a future with unlimited clean electricity from fusion a reality.   What You Will Be Doing: We are hiring a Senior Electrical Engineer to support the core energy management system for our fusion generators. You will support various electrical energy management systems including energy delivery for the magnetics, fusion energy recovery, re-distribution network, as well as AC grid-tie networks. You will report directly to our Senior Manager of Electrical Engineering at our Everett, WA office. You Will: Design, test, troubleshoot, and support operation of high voltage electrical power systems for driving pulsed magnetic coils Oversee design, procurement, construction, and commissioning of high-power electrical systems to drive pulsed coils (<1ms) at currents up to 5MA and voltages up to 40 kV Develop electrical system architecture and work with designers to produce electrical schematics and installation drawings Develop and vet cost-effective, scalable, and reliable design solutions via technical peer review through a design review process for each major design project Collaborate with operators of generator power systems through machine commissioning and, for development machines, through the lifetime of the machine with an eye for optimization of future generators Demonstrate rigorous engineering practices including management of cost, schedule, and resource estimates as they pertain to your design, build, and delivery timelines Mentor and support engineering growth of other team members on the electrical engineering team as well as other technical teams Required Skills: 8+ years of experience in power systems engineering or in high-power, high voltage pulsed power systems up to 40kV, especially in the system requirement and design phases Bachelor’s or Master’s level degree in Electrical Engineering, Physics, or a related technical field Experience in design, fabrication, installation and test of high voltage electronics Strong background with solid state switching technologies and understanding of operating characteristics of power electronic components such as IGBTs, power MOSFETs, and SCRs Technical expertise in the application of engineering concepts, principles, codes, and theory, and practice with the ability to coordinate workloads to meet established deadlines or milestones with some experience in project leadership Advanced in electronic troubleshooting systems using standard benchtop tools such as oscilloscopes, Eloads, pulse generators, spectrum analyzers, and PCB design software Experience with Microsoft Suite, LTSpice, SIMtrex/Simplis, Altium, Matlab Compensation and Benefits At Helion, we are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. We ensure all our roles are competitively benchmarked and our total compensation package includes a base salary, comprehensive benefits, and equity grants, giving you a true stake in Helion's success. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to maintaining internal equity, ensuring fairness and transparency across our teams. This is an exempt salaried role. Annual Base Pay $154,000 — $187,000 USD Benefits Our total compensation package includes benefits, including but not limited to:   Medical, Dental, and Vision plans for employees and their families   31 Days of PTO (21 vacation days and 10 sick days)   10 Paid holidays, plus company-wide winter break   Up to 5% employer 401(k) match   Short term disability, long term disability, and life insurance   Paid parental leave and support (up to 16 weeks)   Annual wellness stipend    NOTE: Underrepresented people are less likely to apply unless they meet 100% of the job's requirements. We believe in hiring people, not checklists, and encourage you to apply even if you do not check all of the boxes. If this job isn't the one, we have many other openings that may be a fit. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, disability, age, sexual orientation, gender identity, national origin, veteran status, or genetic information. If we reach out to you to begin an interview process, we will also ask if you require any reasonable accommodation at that time.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing: As an Electrical Systems Engineer, you will be at the center of bringing our next-generation fusion machine hardware to life. You’ll own the integration of electrical subsystems into a cohesive, reliable system, ensuring that power, control, and communication networks work seamlessly together. You’ll design and deliver the electrical harnesses that connect our machines, manage the interfaces between disciplines through clear requirements and ICDs, and work directly with suppliers to bring critical hardware into production. This role blends detailed hands-on engineering with system-level ownership, ideal for engineers who thrive at both detail and system scales. You will report to the Electrical Engineering Lead, and this is an onsite role located at our Everett, WA office. You Will: Own the integration of electrical components and subsystems into full systems Define, maintain, and enforce system-level requirements and interface control documents (ICDs) across electrical, mechanical, and/or software teams Lead the design, documentation, and validation of electrical harnesses, ensuring manufacturability, reliability, and compliance with standards Collaborate with and manage harness suppliers—delivering build packages, reviewing prototypes, and qualifying production deliveries Work hands-on in the lab during system bring-up, debugging integration issues, and validating end-to-end functionality Partner with cross-functional teams to ensure subsystem designs align with top-level system goals and requirements Drive continuous improvement in integration processes, test strategies, and documentation practices Required Skills: Bachelor’s or master’s degree in electrical engineering or related field 3+ years of experience in electrical system integration, test, or design engineering Strong background in electrical schematics, harness design, and interconnect systems Experience writing, maintaining, and enforcing system-level requirements and ICDs Proficiency with CAD/eCAD tools for harness and schematic design (Altium, NX, etc ). Hands-on experience with system bring-up, troubleshooting, and root-cause analysis using lab instrumentation (oscilloscopes, DMMs, spectrum analyzers, etc.) Proven ability to collaborate across disciplines and communicate clearly in technical and non-technical settings Strong documentation discipline and ability to manage supplier deliverables #LI-Onsite #LI-KL1 Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $124,000 — $172,000 USD Benefits Our total compensation package includes benefits, including but not limited to: Medical, Dental, and Vision plans for employees and their families 31 Days of PTO (21 vacation days and 10 sick days) 10 Paid holidays, plus company-wide winter break Up to 5% employer 401(k) match Short term disability, long term disability, and life insurance Paid parental leave and support (up to 16 weeks) Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing The Tool Room Technician ensures the machine shop's cutting and Workholding tools are expertly managed, ensuring productive daily operations. Your primary responsibility will be to purchase, setup, preset, and manage inventory of necessary cutting tools, cutting tool assemblies, and custom and standard Workholding. You will work with Machinists, Engineering, and Supply Chain to uphold standards to ensure efficient operations and rapid deployment of fusion generators. You will report directly to the Machine Shop Manager at our Everett location. You Will Build cutting tool and Workholding packages based on tool lists Source and purchase necessary cutting tools, cutting tool holders and accessories, and standardized Workholding Organize high quantities of different cutting tools and Workholding for traceability and rapid deployment to machining assets Administer vendor managed inventory (VMI) Preset cutting tool assemblies using a Zoller tool setter, using RFID for preset data transfer Digitally build and manage cutting tool assemblies in the tool management system (TMS) Required Skills High school diploma or equivalent 3+ years' experience in machine shop, tooling management environment 3+ years experience operating and programming CNC tool presetters (preferably Zoller – Haimer also applicable) Experience using software-based tool management systems (preferably Zoller – Wintool, TDM, and CribMaster also applicable) Experience managing RFID tracked cutting tool assemblies Read and interpret technical drawings and specifications for mechanical and electromechanical parts Experience with industry machining standards, regulations, and techniques #LI-Onsite Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is a non-exempt hourly role. Hourly Pay Rate $32 — $40 USD Benefits Our total compensation package includes benefits, including but not limited to: Medical, Dental, and Vision plans for employees and their families 31 Days of PTO (21 vacation days and 10 sick days) 10 Paid holidays, plus company-wide winter break Up to 5% employer 401(k) match Short term disability, long term disability, and life insurance Paid parental leave and support (up to 16 weeks) Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing: As a Senior Firmware Engineer, you will develop the embedded systems that power the control, diagnostics, and protection layers of our fusion machines. You’ll write and maintain firmware that runs on thousands of distributed embedded devices controlling and monitoring tens of thousands of sensors, actuators, and data channels. This role bridges hardware and software — you’ll work closely with electrical and software engineers to design reliable, scalable, and high-performance control and data acquisition systems. You’ll help define communication protocols, improve time synchronization across embedded networks, and automate hardware bring-up and testing. This position is ideal for an engineer who enjoys working close to the metal, debugging complex systems, and rapidly iterating on real-world hardware to make fusion power a practical reality. You Will: Develop, test, and maintain firmware for real-time embedded systems used in machine control and diagnostics Work closely with hardware and software engineers to translate system requirements into embedded designs Bring up new boards, sensors, and actuators — debugging with oscilloscopes, logic analyzers, and JTAG interfaces Implement and maintain low-level communication protocols (UART, SPI, I²C, CAN, EtherCAT, etc.) Design and refine embedded command interfaces, configuration utilities, and automated test frameworks Optimize performance, reliability, and timing synchronization across distributed embedded systems Contribute to continuous improvement of embedded toolchains, build systems, and test automation Rapidly prototype novel control and measurement concepts to support new machine architectures Collaborate across disciplines to ensure firmware integrates seamlessly with high-level software and data systems Required Skills: BS or higher in Electrical Engineering, Computer Engineering, or Computer Science 8+ years of experience developing embedded systems in C, C++, and/or Rust Experience with real-time MCU development (bare metal or RTOS-based) Strong understanding of digital communication protocols (UART, SPI, I²C) Familiarity with mixed-signal circuit design and debugging using oscilloscopes, DMMs, and logic analyzers Experience with version control systems (Git) Scripting experience in Python for automation, hardware bring-up, or testing Solid grasp of embedded systems fundamentals: power, timing, data, and memory budgets Experience developing and debugging on Linux-based systems #LI-Onsite #LI-KL1 Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $150,000 — $194,000 USD Benefits Our total compensation package includes benefits, including but not limited to: Medical, Dental, and Vision plans for employees and their families 31 Days of PTO (21 vacation days and 10 sick days) 10 Paid holidays, plus company-wide winter break Up to 5% employer 401(k) match Short term disability, long term disability, and life insurance Paid parental leave and support (up to 16 weeks) Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group and new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). Now, we're turning up operations for Polaris, working towards delivering the world's first fusion power plant.  More than ever, it's a pivotal time to join us and have the opportunity to solve real challenges to create a better energy future. You will see first-hand how we value urgency, rigor, ownership, and hard truths, knowing it will take each to do what no one has before. Joining us, you will push the boundaries of what's possible and transform humanity for the better - because the world can't wait. What You Will Be Doing: As the Project Manager for the Experimental Science team at Helion, you will play a critical role in enabling our science, research, and engineering teams to plan proactively, improve operations, and deliver transformative work to bring fusion energy to the world urgently. You will lead the development of scalable project and program management frameworks, drive alignment across diverse stakeholders, and ensure that critical milestones are achieved on time and within budget. You will bring discipline and clarity to planning and execution, while staying adaptable in a fast-paced, discovery-driven environment. This is an onsite role that reports directly to Director of Science at our Everett, WA office. You Will: Drive the planning and execution of complex, cross-disciplinary initiatives in experimental science, including plasma, computational, and diagnostic research Own high-level program timelines and break them down into actionable project plans with defined milestones, deliverables, and interdependencies Track progress across teams, identify risks early, and implement mitigation plans for delivery schedules Regularly communicate project status, risks, and outcomes to stakeholders at all levels Build dashboards, reports, and presentations to provide visibility into project health and resource needs Design and implement cross-functional processes that enhance proactive planning, resource allocation, and timeline forecasting Establish tools and workflows to improve budget tracking and predictability in a rapidly evolving research environment Act as a central liaison between experimental science, research, engineering, operations, and executive leadership Develop a deep understanding of what various teams are planning and executing, enabling better forecasting, prioritization, and coordination Facilitate decision-making and alignment across diverse technical and non-technical stakeholders Required Skills: Advanced degree in science or engineering 3+ years of technical industry experience in a scientist or engineering role 2+ years as a technical project or program manager, ideally with PMP certification Experience managing complex scheduling, budgets, and cross-functional initiatives Experience organizing and planning projects that zoom out to big-picture programs while managing detailed execution Experience communicating with and managing cross-functional stakeholders including engineers, scientists, and executives Experience creating and improving cross-functional processes, planning cycles, or budget forecasting tools Familiarity with scientific research lifecycles and the unique challenges of experimental development environments #LI-ONSITE #LI-AM1 Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $100,000 — $130,000 USD Benefits Our total compensation package includes benefits, including but not limited to:  •    Medical, Dental, and Vision plans for employees and their families  •    31 Days of PTO (21 vacation days and 10 sick days)  •    10 Paid holidays, plus company-wide winter break  •    Up to 5% employer 401(k) match  •    Short term disability, long term disability, and life insurance  •    Paid parental leave and support (up to 16 weeks)  •    Annual wellness stipend   Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing: As our Construction Project Manager, you will support leading end-to-end planning and execution of construction projects across Helion's sites. You'll manage budgets, schedules, internal crew task planning and contractors while ensuring projects meet safety, quality, and regulatory standards. You'll balance day-to-day details with big-picture milestones, coordinating across engineering, production, EHS, and facilities to keep projects moving at the speed our mission demands. You will report directly to our Facilities Construction Manager, and this is an onsite role located at our Everett, WA office. You Will: Support Facilities leadership in managing the full lifecycle of construction projects—from scope and design through commissioning and handoff Coordinate daily construction activities, ensuring alignment with design, schedule, safety, and permitting requirements Build and maintain project schedules; escalate risks and blockers quickly Assist with budgeting, cost tracking, and vendor invoicing Manage subcontractors and suppliers to meet schedule, cost, and quality standards Maintain project documentation, including permits, drawings, and compliance records Conduct site walks to monitor progress, quality, and safety Partner with engineering and operations teams to align scope, design, and execution Uphold safety, environmental health, and compliance standards Act with urgency to resolve roadblocks and maintain project momentum Required Skills: 5+ years of experience managing construction projects from initiation through close-out Experience with industrial, R&D, or energy/facility construction projects Strong knowledge of construction methods, building codes, and permitting Proven ability to manage budgets, schedules, and contractors on complex, multi-trade projects Track, prioritize, and deliver multiple construction and facility upgrade projects simultaneously—balancing schedule, budget, and evolving technical requirements in complex, scaling environments Ensure engineers, contractors, vendors, and internal teams stay coordinated to deliver projects on time and safely Commitment to safety, quality, and continuous improvement #LI-Onsite #LI-MM1 Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $120,000 — $160,000 USD Benefits Our total compensation package includes benefits, including but not limited to: Medical, Dental, and Vision plans for employees and their families 31 Days of PTO (21 vacation days and 10 sick days) 10 Paid holidays, plus company-wide winter break Up to 5% employer 401(k) match Short term disability, long term disability, and life insurance Paid parental leave and support (up to 16 weeks) Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone.   Since Helion's founding in 2013, we have raised over $600 million from investors such as Sam Altman, Mithril, and Capricorn Investment Group to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV).   Now we are working toward Polaris, which will be the first machine to demonstrate electricity from fusion, making this a great time to join Helion! Bring your skills, experiences, and determination to make a difference in the world. Together, we can make a future with unlimited clean electricity from fusion a reality.   What You Will Be Doing: We are hiring a Senior Mechanical Engineer to own hardware designs for Helion's fusion generator prototypes. You will solve multidisciplinary engineering problems that are necessary for deploying fusion energy to the world and act as a culture driver on a growing team. You will report directly to our Senior Manager of Engineering at our Everett, WA office. You Will: Own and understand subsystem designs such as electromagnetic, structural, fluid, thermal and control systems, and improve their requirements Learn from historical engineering approaches, design novel hardware, and test your solutions Design fusion hardware within 3D CAD software (e.g. NX, Solidworks) Perform analysis with tools like ANSYS and hold design reviews to gather feedback and iterate to a fully functioning system Learn from experts to expand your engineering skillset and domain knowledge Work hands-on alongside experienced technicians to implement your hardware designs Troubleshoot hardware issues as they arise on integrated fusion generators Required Skills: Bachelor's degree in engineering 8+ years of professional experience delivering on full-scope engineering projects (including schedule ownership) Experience applying engineering first-principles and method-based thinking to challenging problems Hands-on exposure to a variety of engineering disciplines (mechanical, electrical, fluids) Advanced experience with CAD software (e.g. NX, Solidworks) Moderate experience with FEA software (e.g. ANSYS Maxwell, FEMAP) Moderate experience with GD&T and generating engineering drawings per ASME Y14.5 Compensation and Benefits At Helion, we are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. We ensure all our roles are competitively benchmarked and our total compensation package includes a base salary, comprehensive benefits, and equity grants, giving you a true stake in Helion's success. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to maintaining internal equity, ensuring fairness and transparency across our teams. This is an exempt salaried role. Annual Base Pay $147,000 — $190,000 USD Benefits Our total compensation package includes benefits, including but not limited to:   Medical, Dental, and Vision plans for employees and their families   31 Days of PTO (21 vacation days and 10 sick days)   10 Paid holidays, plus company-wide winter break   Up to 5% employer 401(k) match   Short term disability, long term disability, and life insurance   Paid parental leave and support (up to 16 weeks)   Annual wellness stipend    NOTE: Underrepresented people are less likely to apply unless they meet 100% of the job's requirements. We believe in hiring people, not checklists, and encourage you to apply even if you do not check all of the boxes. If this job isn't the one, we have many other openings that may be a fit. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, disability, age, sexual orientation, gender identity, national origin, veteran status, or genetic information. If we reach out to you to begin an interview process, we will also ask if you require any reasonable accommodation at that time.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing: We are hiring a Supplier Development Engineer to work with suppliers to make parts for fusion generators. You will solve technical problems, develop our supplier's quality systems, and accelerate Helion's transition from rapid prototyping to mass generator manufacturing, thus delivering on Helion's mission of providing clean electricity to the planet. This role requires an onsite presence and you will report to our Senior Manager of Electrical Engineering at our Everett, WA office. You Will: Collaborate with design engineers to gain an in-depth knowledge of part, assembly, and sub-system design intent Assess suppliers' manufacturing processes and quality systems to source parts, in partnership with procurement team Support product ramp from new product introduction through to high-volume manufacturing Define supplier technical and quality specifications based on engineering and program requirements Implement and monitor the production part approval process (PPAP) with selected suppliers to promote rate production Ensure suppliers understand requirements for document submissions (e.g., first article inspection reports, quality documentation) Develop and approve process controls for important characteristics Recommend technical product improvements to reduce risk and potential defect opportunities Analyze supplier quality and delivery metrics to identify trends and systemic performance gaps to improve plans Coordinate between suppliers, engineers, buyers, and production to resolve supplier quality issues Guide supplier corrective actions associated with escapes or containments identified in production or the supply chain Improve the supply chain Help build the supplier quality program and team at Helion Help develop receiving inspection and quality standards Required Skills: 3+ years of engineering, manufacturing, or supply chain experience—including school projects, clubs, or internships—in mechanical or electrical systems Bachelor's degree or higher in an engineering discipline, or relevant field Experience managing external suppliers Knowledge of supplier quality processes (e.g., production part approval process, advanced product quality planning, first article inspection reports) Knowledge of statistical techniques and methods (e.g., design of experiments, Six Sigma) Experience with quality systems (ISO 9000 / TS) Able to travel up to 50% of the time #LI-Onsite #LI-KL1 Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $123,000 — $164,000 USD Benefits Our total compensation package includes benefits, including but not limited to: Medical, Dental, and Vision plans for employees and their families 31 Days of PTO (21 vacation days and 10 sick days) 10 Paid holidays, plus company-wide winter break Up to 5% employer 401(k) match Short term disability, long term disability, and life insurance Paid parental leave and support (up to 16 weeks) Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. What You Will Be Doing: In this role, you'll ensure that critical mechanical, electrical, and facility systems remain operational and safe to support Helion's fusion development activities. We're looking for an experienced Maintenance Mechanic to take the lead on complex maintenance tasks, support team members, and improve the reliability and performance of the infrastructure that supports our mission. You will report to the Facilities Operations Manager and work onsite at our Everett, WA office. You Will: Perform preventive and corrective maintenance on HVAC, plumbing, and electrical systems, along with a range of facility and utility systems found in a complex production environment Diagnose and repair issues across production and facility-dependent equipment, including boom lifts, scissor lifts, forklifts, and overhead cranes Maintain and repair access systems, including roll-up doors, pedestrian doors, and automated gate systems Coordinate and oversee vendor work to meet safety, security, and quality standards Document maintenance activities, including work orders, parts usage, and system performance Required Skills: 5+ years of experience in building, mechanical, or facility maintenance Demonstrated mechanical troubleshooting, repair techniques, and use of diagnostic tools Knowledge of LOTO (Lockout/Tagout) procedures and OSHA safety compliance Ability to read and interpret technical drawings, manuals, and schematics Skilled in operating motorized lift equipment (e.g., forklifts, scissor lifts, boom lifts) Comfortable working at heights and using fall protection equipment High school diploma or equivalent required; technical certifications in HVAC or related trades are a plus #LI-Onsite #LI-MM1 Total Compensation and Benefits Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation. This is an exempt salaried role. Annual Base Pay $52 — $74 USD Benefits Our total compensation package includes benefits, including but not limited to: Medical, Dental, and Vision plans for employees and their families 31 Days of PTO (21 vacation days and 10 sick days) 10 Paid holidays, plus company-wide winter break Up to 5% employer 401(k) match Short term disability, long term disability, and life insurance Paid parental leave and support (up to 16 weeks) Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.