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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 apply technical understanding of radiation safety, scientific fundamentals, and diagnostic equipment to support research, development, and radiation safety activities across the RaSNS department. You will install, test, troubleshoot, and maintain radiation detection and monitoring systems while upholding safety, quality, and procedural standards. In this role, you will solve technical problems, assess system performance, and contribute to continuous improvement of workflows. You will also develop proficiency in radiation safety practices and expand your capabilities through hands-on learning, curiosity-driven investigation, and close collaboration with engineers and senior Technologists.

You Will:

• Install, operate, and maintain radiation detection, monitoring and development systems that support RaSNS engineering activities

• Configure detector, mechanical, and analytical equipment; perform routine system checks; and identify issues requiring troubleshooting or escalation

• Apply scientific reasoning and diagnostic methods to evaluate system behavior, validate test configurations, and support experimental readiness

• Conduct repairs or adjustments to equipment under defined procedures, ensuring safety, accuracy, and compliance with quality standards

• Develop working knowledge of radiation safety practices, including contamination control, monitoring techniques, and controlled-area workflows

• Learn tritium handling and work to become a tritium Authorized User

• Document test setups, observations, and system performance with clarity and discipline, using data to track reliability and communicate functionality

• Collaborate with Engineers and Senior Technologists to refine processes, improve system reliability, and advance department goals

• Continuously expand your technical skills through hands-on learning, curiosity-driven problem solving, and engagement with evolving team needs

Required Skills:

• 3+ years of experience with dosimetry, detector, mechanical, and analytical equipment, or technical workflows.

• Introductory familiarity with vacuum systems, cryogenic systems, or demonstrated aptitude for learning complex systems quickly.

• Ability to follow detailed procedures, perform repeatable tasks, and recognize when to request support.

• Demonstrated ability to learn radiological materials work, including surveys, contamination control, tritium protocols, and controlled-area practices.

• Ability to operate detection tools with guidance, capture and present data with care and attention to detail.

• Strong safety mindset and commitment to learning proper PPE use, hazard controls, and work planning.

• Comfort working in and building on structured, procedure-driven environments and escalating uncertainties immediately.

• Ability to document work clearly, maintain organized records, and use digital tools for task tracking and communication.

#LI-TM1 #LI-Onsite

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.