About the role#
We are looking for Mechanical and Magnet Engineering interns to contribute to our fusion energy projects. You will work on-site in Devens, Massachusetts, during the Winter or Summer of 2027. This is a full-time, paid internship where you will join a team focused on designing and building fusion power plants.
What you'll do#
- Design tooling and hardware to speed up magnet production and SPARC assembly through first-principles analysis and rapid prototyping.
- Develop tools for multiphysics and structural analysis to optimize magnet systems and tokamak structures while reducing costs.
- Fabricate and test next-generation designs to inform manufacturing and assembly trade studies, cost reduction, and the commercialization of fusion systems.
What you'll need#
- You are currently pursuing a degree in Mechanical Engineering.
- Experience with 3D CAD, machine shops, and rapid prototyping or assembly.
- Background in first-principles structural and thermal analysis.
- Hands-on experience with student teams like Formula SAE or Rocket Club.
- A track record of achieving results and a drive to execute tasks quickly.
- Strong problem-solving and communication skills, with the ability to work well alongside engineers, scientists, and technicians.
- A commitment to safety, including the ability to work in environments that may involve heat, cold, noise, fumes, strong magnets, lead, high voltage, or cryogenics.
- Ability to perform tasks such as typing, standing, or sitting for extended periods.
Location & details#
- Location: Devens, Massachusetts.
- Work Modality: On-site.
- Duration: 13 to 26 weeks.
- Commitment: 40 to 50 hours per week.
- Eligibility: Must be authorized to work in the United States.
About Commonwealth Fusion Systems
Commonwealth Fusion Systems develops fusion power plants to supply clean energy. Founded in 2018 and based in Devens, Massachusetts, the company employs between 501 and 1,000 people. It specializes in energy technology and has created high-temperature superconducting magnets to support commercial fusion. The organization operates as a private entity.
How to get in at Commonwealth Fusion Systems
Applying early to Commonwealth Fusion Systems gives you a distinct advantage because recruiters review applications before the candidate pool grows too large. Intern Insider sends an instant alert the moment a role matching your target is published anywhere, so you can be among the first to submit your materials. This ensures your profile is visible when the hiring team starts their initial search. You can also improve your response rates by reaching out to the people managing these roles directly. Intern Insider surfaces the recruiters behind the company's roles, allowing you to ask relevant questions or request a referral. Taking this step shows you are serious about the work and helps you stand out from the standard queue.



