Intern - NRad & Nuclear/Systems Engineer - Summer 2027
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Summary
Commonwealth Fusion Systems is hiring Summer 2027 onsite interns in Devens, MA to support its Nuclear Engineering team: running neutronics analyses (MCNP/OpenMC) for the SPARC and ARC fusion machines and bridging nuclear and systems engineering (hazard reviews, radiation requirements, margin budgets). It's a 13-18 week, hourly-paid internship for enrolled nuclear/mechanical engineering students.
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 NRad or Nuclear/Systems Engineering Intern
We are looking for talented NRad and Nuclear/Systems Engineering Interns 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 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:
The NRad intern
- Collaborate with engineers on the Nuclear Engineering team to do neutronics calculations (heating, activation, flux, dose, etc) to support the design and operation of SPARC, the scoping of ARC, and any other nuclear engineering needed
- Work on projects such as, but not be limited to: Neutronics analyses such as energy deposition in delicate materials or shielding sensitivity studies for diagnostic design
- Contribute to the computational development of method and workflows needed to support and optimize different types of neutronics analyses
- Support the interface of Nuclear Engineering and Systems Engineering working collaboratively with both teams on neutronics analyses and their application to the development of system design
- Work on projects such as, but not limited to: participating in Hazard Identification reviews and evaluation of accident scenarios, development and verification of radiation related system requirements, and margin budget development, tracking, and support.
The Nuclear/Systems Engineering Intern
What we’re looking for:
- Pursuing an engineering degree with focus in the fields Nuclear Engineering or Mechanical Engineering
- Neutron Transport or Neutronics or a Reactor Theory course completed by the start of internship
- Experienced in MCNP or OpenMC
- Experience in Mechanical Design through courses, previous internships, or class projects
- Strong communication skills and a willingness to learn
- Must work well in a team
- Must be highly self-motivated and driven to execute quickly with excellent troubleshooting/problem-solving skills
- Prior hands-on experience or internships working in a commercial/research fission plant environment or the naval nuclear power program
- Optional: experienced in CAD and/or Python/ C++
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
#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.
Skills
As published by lever · 12 questions · 5 written answers
Basics
Resume/CV, Full name, Pronouns, Email, Phone, Current location, Current company, LinkedIn URL, Twitter URL, GitHub URL, Portfolio URL, Other website
Short answers (1)
- If you answered “No” to the above, please provide the country or countries of which you are a current citizen or national, and if applicable, where you are currently granted lawful permanent resident status. If you answered “Yes,” please enter N/A*
Pick from a list (5)
- If offered a position at CFS, will you be able to start within 3 weeks?
- The following question is asked for the purpose of ensuring compliance with U.S. Export Control Laws. Are you one of the following: a U.S. citizen, a U.S. national, a lawful permanent resident of the U.S. (e.g. green card holder), or a protected individual as defined by 8 U.S.C. 1324b(a)(3) (e.g., a refugee or asylee)?*
- Are you interested in an Intern position (3 months) or a Co-op position (4 or 6 months)
- Most positions require the intern to be onsite at one of our locations. Will you be available to work onsite for the duration of the internship?
- If offered a position at CFS, will you be able to start within 3 weeks?
Written answers (5)
- Please tell us what interested you to apply to CFS optional
- Optional: Additional information may be added in reference to a start date. optional
- Please tell us what interested you to apply to CFS
- Please list specific dates of internship availability- Include start date and end date.
- Please list the school or university you will be enrolled in during the internship or co-op?
Attachments (1)
- Please Upload a Cover Letter optional