R&D Engineering Intern

As a part of the global industrial organization Marmon Holdings—which is backed by Berkshire Hathaway—you’ll be doing things that matter, leading at every level, and winning a better way. We’re committed to making a positive impact on the world, providing you with diverse learning and working opportunities, and fostering a culture where everyone’s empowered to be their best.

A Summer Experience. A Lifetime of Value.

We’ll meet you where you are and help you go further. This summer, we’re committed to bringing early-in-career talent together, trusting you to own your work and help you level up through professional development, networking, and exposure to real-world projects. 

We’re doing things that matter. Our wire and cable power our world. Join us as an intern and we’ll help you move up and around Marmon’s 120+ companies as you grow your skills.

Join the Biggest Small Business You’ll Ever Find. 

Marmon Industrial Energy & Infrastructure (MIEI) works with six specialty wire, cable, and tubing solution manufacturing companies located throughout North America. We have over 100 years of innovative engineered solutions for critical, industrial, and commercial applications.As part of Marmon, you get the best of both worlds. The strength and stability that comes with being part of Berkshire Hathaway, plus the autonomy and opportunity that comes with working at one of our 120+ companies.

What You’ll Do:

As an R&D Engineering Intern, you will play a key role in driving innovation and product excellence within our Research and Development team. This exciting internship offers hands-on experience in laboratory testing, materials analysis, and product development for specialty wire and cable products.

You’ll assist engineers in setting up and conducting performance and compliance tests according to industry standards (UL, ASTM, IEC), prepare test samples, record results, and compile technical data for analysis. You’ll also support prototype development through material preparation, extrusion trials, and process optimization, contributing directly to real-world R&D projects.

This internship will immerse you in the full R&D process—from concept development to testing and validation—while giving you the chance to identify trends, solve technical challenges, and propose improvements. You’ll collaborate with experienced engineers, gain exposure to cross-functional teams, and make meaningful contributions to product innovation that impact the company’s growth and competitive advantage.

Throughout the internship, you will develop problem-solving, data analysis, and collaboration skills while building practical experience in engineering standards and processes. You will learn to utilize laboratory and technical tools, understand compliance requirements, and participate in projects that accelerate real-world R&D initiatives.

What You’ll Need:

• Currently pursuing a Bachelor’s degree in Chemical Engineering, Materials Science, Mechanical Engineering, Electrical Engineering, or a related technical field

• Strong academic foundation in materials science, polymer science, or engineering principles

• Basic knowledge of laboratory testing methods and equipment

• Proficiency in Microsoft Office Suite (Excel, Word, PowerPoint) for data analysis and reporting

• Strong analytical and problem-solving skills with attention to detail

• Ability to work independently and collaboratively in a team environment

• Effective written and verbal communication skills

• Willingness to learn and adapt to new processes, tools, and technical standards

• Entering Sophomore year or higher

Compensation:

• $22–$27 per hour, commensurate with relevant experience and educational background

Work Hours/Length of Program:

• The internship will run for 12 weeks from May to August

• Temporary Part/Full Time, targeting 40 hours per week

• Exact start and end dates are flexible based on school schedules and the needs of the business

• This is a paid internship

Working Conditions and Physical Demands:

This position is based primarily in a laboratory and office environment, with exposure to manufacturing areas requiring adherence to safety procedures and use of personal protective equipment (PPE). The environment may involve exposure to noise, temperature fluctuations, or other factors. Employees are required to abide by PPE guidelines when onsite.

• May require standing for extended periods during lab testing or sample preparation

• Occasional lifting of materials and equipment up to 25 pounds

• Regular use of standard laboratory equipment, instrumentation, and computers

• Ability to follow detailed written and verbal instructions in a controlled testing environment

• Successful completion of a drug screening and a physical exam are required for this role

Location:

East Granby, Connecticut – Onsite

Following receipt of a conditional offer of employment, candidates will be required to complete additional job-related screening processes as permitted or required by applicable law.

We are an equal opportunity employer, and all applicants will be considered for employment without attention to their membership in any protected class. If you require any reasonable accommodation to complete your application or any part of the recruiting process, please email your request to careers@marmon.com, and please be sure to include the title and the location of the position for which you are applying.