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Salary
$50k – $76k per year
Location
In office (Milpitas)
Seniority
Intern
Employment
Internship

Confirmed on the employer's own hiring board on Oct 20, 2026. First seen by Alion on Oct 15, 2026. Commonwealth Fusion Systems scores A on the Alion truth index.

Overview
Company
Impact
Profile match
Commonwealth Fusion Systems is a commercial fusion energy company headquartered in Devens, Massachusetts, and founded in 2018. The firm specializes in the development of high-temperature superconducting magnets and compact tokamak devices, specifically the SPARC net-energy machine and the ARC commercial power plant. It operates through a strategic partnership with the Massachusetts Institute of Technology and focuses on scaling fusion technology to provide carbon-free, baseload power to global energy markets.

Join the power movement as a Mechanical Engineering Intern

We are looking for a talented Mechanical Engineering Intern to join our team! CFS interns are highly valued within the organization and placed into meaningful and challenging roles.

Program Details:

  • 13-18 week internship
  • 40-50 hours per week with set hourly salary based on year in school
  • Opportunities on site in Milpitas, CA. 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:

  • Mechanical Design & Engineering Analysis: Perform design CAD modeling, detail drafting, and fundamental engineering calculations to validate mechanical hardware
  • Build, Assembly & Testing: Hands-on fabrication, prototyping, hardware assembly, and physical testing/validation in the shop or lab
  • CAD & Digital File Organization: Organize CAD models, maintain standard component libraries, and clean up workspace file structures to ensure data is easy to navigate and reuse
  • Lab & Shop Housekeeping: Assist in setting up shop toolboxes, organizing incoming parts/inventory, and implementing physical organizational systems to maintain an efficient engineering workspace

What we’re looking for:

    • Pursuing an engineering degree with focus in the fields of Mechanical Engineering, Aerospace Engineering, Mechatronics
    • 3D CAD modeling, engineering calculations
    • FEA (nice to have)
    • Hands-on assembly
    • Basic machining
    • 3D printing
    • Student team and activities (Formula SAE, robotics, machine shop expreience)
    • Strong organizational skills

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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