INTERNSHIP DETAILS

Intern - R&D Test Engineer - Spring or Summer 2027

CompanyCommonwealth Fusion Systems
LocationSomerville
Work ModeOn Site
PostedOctober 30, 2026
Internship Information
Core Responsibilities
Interns will design and build R&D samples, develop manufacturing processes, and execute test operations for novel HTS magnet technology. They will also design test equipment, perform structural or thermal analyses, and manage project documentation and technical reporting.
Internship Type
internship
Salary Range
$25 - $38
Company Size
1127
Visa Sponsorship
No
Language
English
Working Hours
40 hours
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About The Company
Commonwealth Fusion Systems (CFS) is on a mission to deliver clean fusion energy to the planet fast enough to matter for humanity’s biggest challenges. It’s urgent. The gap between the energy we need and the energy we have is widening every day. Fusion is a critical part of the energy transition away from fossil fuels, a new chapter for the world’s energy supply. We’re committing to delivering fusion power plants and a full-fledged fusion energy industry as we’ve delivered on other promises. Like the world’s strongest high-temperature superconducting magnet, the game-changing technology that’s making commercial fusion energy a reality. We’ve raised $4 billion in capital — more than any other fusion energy company — and attracted top talent to design, build, and deliver commercial fusion power plants. And we’re working with policymakers and suppliers to make fusion energy available globally. As we push toward the fusion-energy future, we’ll keep setting and meeting milestones, sharing and validating our progress, and encouraging others to do the same. If you're interested in joining our team, check out cfs.energy/careers for more information. SPARC®, ARC™, and Fall Line Fusion Power Station™ are trademarks of Commonwealth Fusion Systems®.
About the Role

About Commonwealth Fusion Systems: 

 

Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy.

 

Combining decades of research, top talent, and new technologies, we’re designing and building commercially viable fusion power plants. And we're working with policymakers, suppliers, and many others to build the energy industry of the future.

 

We’re in the best position to make it happen. Since 2018, we’ve raised $4 billion of capital, making us the largest and leading fusion company in the world.

 

Now we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team. 

 

If that’s you and this role fits, we want to hear from you.


Join the power movement as an R&D Test Engineering Intern

 

We are looking for talented R&D Test Engineering Interns to join our team! CFS interns are highly valued within the organization and placed into meaningful and challenging roles.

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Program Details:
  • 13-26 week internship
  • 40-50 hours per week with set hourly salary based on year in school
  • Opportunities on site in Devens, MA. If an intern is going to be on site, you will be responsible for your own transportation and housing
  • Specific project assignments and required technical skillset will vary based on the team’s existing need.
  • Opportunities available for currently enrolled college students in all levels of schooling from bachelor’s degree to PhD
  • Interns must be authorized to work in the United States for any employer


What you'll do:
We currently have multiple openings for the R&D Test Engineering Internship. Please note that the following list encompasses all available roles, so individual responsibilities will vary depending on the specific position:
  • Design and build R&D samples and develop associated manufacturing processes, and execute test operations in support of risk-mitigation development campaigns for novel HTS magnet technology
  • Design, build, and commission test equipment and collaborate with instrumentation and controls engineers to develop associated sensors and data acquisition as needed
  • Perform structural, electrical, and/or thermal analyses in support of R&D sample design and to predict test results
  • Create and manage design, process, and test documentation along with schedules, budgets, BOMs, instrumentation indexes, etc. and deliver technical update presentations to manager and cross-functional technical teams as needed


What we’re looking for:
  • Pursuing an engineering degree with focus in the field of Mechanical Engineering
  • Prior experience with a hands-on hardware internship, Formula SAE, Rocket Club, Machine Shop, or equivalent
  • Demonstration of exceptional results through a range of different pursuits
  • High self-motivation and drive to execute quickly with excellent troubleshooting/problem-solving skills
  • Communication - not afraid to ask for help, shows evidence that they’d integrate nicely into a team of technical engineers / scientists, but also able to communicate with people with less of a technical background, like technicians, supply chain, etc
 
 


Must-have Requirements:
  • Willingness to travel or work required nights/weekends/on-call occasionally
  • Perform activities such as typing, standing, or sitting for extended periods of time
  • Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics


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$25 - $38 an hour
Rates are aligned to your current year in school, ensuring equitable and consistent pay across our intern program.
 
For BS interns, the hourly rate is $25–$32
For MS/PhD interns, the rate is $35–$38
 
Benefits included for full-time interns:
•     40 hours of sick time
•     Health, dental, and vision insurance
•     401(k) with employer matching (must be 21 years of age to enroll)
•     Professional growth opportunities
•     Team-building activities
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#LI-Onsite


At CFS, we excel in fast-paced environments, driven by our values of integrity, execution, impact, and self-critique. As we grow, we’re eager to bring on mission-driven folks who offer diverse perspectives and fresh ways to tackle challenges.

 

We value diversity deeply and are proud to be an equal opportunity employer by choice. We consider all qualified applicants equally, regardless of race, color, national origin, ancestry, citizenship status, protected veteran status, religion, physical or mental disability, marital status, sex, sexual orientation, gender identity or expression, age, or any other basis protected by law.

 

This role requires compliance with U.S. laws concerning the export of controlled or protected technologies or information (collectively, “Export Control Laws"). Any offer of employment will be contingent on the need for compliance with such Export Control Laws.

Key Skills
Mechanical engineeringHardware testingData acquisitionInstrumentationStructural analysisThermal analysisElectrical analysisTroubleshootingProblem-solvingTechnical documentationManufacturing processesRisk-mitigationCommunicationTeamwork
Categories
EngineeringEnergyScience & ResearchManufacturingTechnology
Benefits
Sick timeHealth insuranceDental insuranceVision insurance401(k) with employer matchingProfessional growth opportunitiesTeam-building activities