Intern - Nuclear Engineer - Summer 2027
- Location
- Devens, MA · On-site
- Job type
- Full-time
- Level
- Entry level
- Education
- Bachelor's degree
- Listed
- 14 days ago
Skills & highlights for this role
- Nuclear engineering coursework
- Neutron Transport, Neutronics, or Reactor Theory coursework
- MCNP or OpenMC experience
- Strong communication skills
- Teamwork
- Self-motivation
- Troubleshooting and problem-solving
Also useful
- CAD experience
- Python experience
- C++ experience
- Monte Carlo neutronics methods
- Deterministic neutronics methods
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 intern will 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
- They will 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
- They will have opportunities to contribute to the computational development of method and workflows needed to support and optimize different types of neutronics analyses
What we’re looking for
- Pursuing an engineering degree with focus in the field of Nuclear Engineering - required
- Have complete by the start of their internship Neutron Transport or Neutronics or a Reactor Theory course
- Experienced in MCNP or OpenMC
- 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
- Optional: experienced in CAD and/or Python / C++, Neutronics Methods (Monte Carlo or Deterministic)
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.
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.
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 Nuclear Engineering Intern
We are looking for a talented Nuclear Engineering Intern to join our team! CFS interns are highly valued within the organization and placed into meaningful and challenging roles.
Equal opportunity and legal notices
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.
From Commonwealth Fusion Systems's careers page, first listed on Rolev.ai on October 26, 2026. Rolev.ai is not the employer.
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Common questions
Where is the Intern - Nuclear Engineer - Summer 2027 job at Commonwealth Fusion Systems located?
This Intern - Nuclear Engineer - Summer 2027 position at Commonwealth Fusion Systems is located in Devens, MA (On-site). Always check Commonwealth Fusion Systems's application page for specific state eligibility or relocation policies.
What qualifications are required for Intern - Nuclear Engineer - Summer 2027 at Commonwealth Fusion Systems?
For the Intern - Nuclear Engineer - Summer 2027 role, Commonwealth Fusion Systems highlights a bachelor's degree; experience with Nuclear engineering coursework, Neutron Transport, Neutronics, or Reactor Theory coursework, MCNP or OpenMC experience, Strong communication skills, Teamwork, Self-motivation. Rolev.ai can score your existing resume against these requirements and show any skill gaps before you apply.
How do I apply for the Intern - Nuclear Engineer - Summer 2027 position at Commonwealth Fusion Systems?
This listing links directly to Commonwealth Fusion Systems's Lever application page. You can apply directly on Commonwealth Fusion Systems's site, or use Rolev.ai to check your resume fit, generate a zero-hallucination tailored resume and cover letter for this posting, and autofill the Lever application form in 1 click with the Rolev.ai Chrome extension. You always review the form and press Submit yourself.