Intern - Mechanical Engineer - Fall Co-op 2026
About The Position
Commonwealth Fusion Systems (CFS) is seeking a talented Mechanical Engineering Intern to join their team for the Fall Co-op 2026 program. CFS is dedicated to accelerating the transition to fusion energy by designing and building commercially viable fusion power plants. This internship offers a meaningful and challenging role within the organization, with opportunities for on-site work in Devens, MA. The program details include a 26-week internship, 40-50 hours per week with a set hourly salary based on the intern's year in school. Interns must be authorized to work in the United States. Specific project assignments and technical skillsets will vary based on team needs. CFS is a leading private fusion company with significant capital investment, looking for individuals who bring new perspectives and can solve tough problems.
Requirements
- Pursuing an engineering degree with focus in the fields of Mechanical, Electrical or Aerospace
- Curious, high-initiative, and bias towards execution
- Approaches problems from a fundamental physics perspective
- Crisp communication paired with technically dense documentation
- 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
Nice To Haves
- Ideally, background in design, build, and test of highly-loaded hardware or large tooling assemblies
- Ideally, experience with CAD systems to design parts and release drawings for manufacturing
- Understanding of GD&T
- Ideally design review experience in a technical environment
- Ideally experience running simple testing to validate designs
- A commitment to a safe working environment
Responsibilities
- Design and build of tooling used for integration and assembly of complex hardware
- Development of workflows to reverse engineer hardware or adjust installation to meet final system tolerances
- Supporting in-field integration of hardware into a tokamak fusion device
- Design of actuated systems to remotely install and remove large structural components
Benefits
- 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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What This Job Offers
Job Type
Full-time
Career Level
Intern
Education Level
Associate degree
