Intern - Mechanical Engineer - Summer 2027
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Before you apply
SalaryNo pay range posted
LocationMilpitas, CA
Work modeon-site
Typeinternship
SeniorityEntry
DepartmentInternships
Company size501–1,000 people
PostedOct 15, 2026 · 3w ago
Verified live3d ago
At a glanceSummarised by Seekless from the posting.
Pursuing an engineering degree in Mechanical Engineering, Aerospace Engineering, Mechatronics, Manufacturing Engineering, or a related field.
3D CAD modeling and first-principles engineering calculations
Basic exposure to Finite Element Analysis (FEA) or engineering simulation tools.
Physical assembly, 3D printing/rapid prototyping, basic machining, and comfort in a shop or lab environment.
Active participation on hands-on student teams or campus roles (e.g., Formula SAE/Baja, Robotics/Combat Robotics, Rocketry, Aero/DBF, Solar Car, or Machine Shop staff).
Mindset for managing both physical shop inventory (toolboxes, part tracking) and digital data (CAD libraries, file structures).
Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics
Willingness to travel or work required nights/weekends/on-call occasionally
Perform activities such as typing, standing, or sitting for extended periods of time
Interns must be authorized to work in the United States for any employer
Compliance with U.S. laws concerning the export of controlled or protected technologies or information
Skills
3D CAD
Finite Element Analysis (FEA)
3D printing
machining
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 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:
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13-18 week internship
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40-50 hours per week with set hourly salary based on year in school
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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
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Specific project assignments and required technical skillset will vary based on the team’s existing need.
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Opportunities available for currently enrolled college students in all levels of schooling from bachelor’s degree to PhD
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Interns must be authorized to work in the United States for any employer
What you’ll do:
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Mechanical Design & Engineering Analysis: Perform design CAD modeling, detail drafting, and fundamental engineering calculations to validate mechanical hardware
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Build, Assembly & Testing: Hands-on fabrication, prototyping, hardware assembly, and physical testing/validation in the shop or lab
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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
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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 in Mechanical Engineering, Aerospace Engineering, Mechatronics, Manufacturing Engineering, or a related field.
•
3D CAD modeling and first-principles engineering calculations
•
Basic exposure to Finite Element Analysis (FEA) or engineering simulation tools.
•
Physical assembly, 3D printing/rapid prototyping, basic machining, and comfort in a shop or lab environment.
•
Active participation on hands-on student teams or campus roles (e.g., Formula SAE/Baja, Robotics/Combat Robotics, Rocketry, Aero/DBF, Solar Car, or Machine Shop staff).
•
Mindset for managing both physical shop inventory (toolboxes, part tracking) and digital data (CAD libraries, file structures).
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
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.
Legal
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.