Intern - Nuclear Engineer - Summer 2027
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Quick Summary
Overview
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,
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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.
- 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)
#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.
Location & Eligibility
Where is the job
Devens, United States
On-site at the office
Who can apply
US
About this job
- Pay per year
- ≈ $52,000–$79,040 a year
- 3% below the $67,500 median for Other jobs on Jobera (115,751 salaries).
- Who can apply
- United States
- Posted
- Today
Listing Details
- Posted
- October 15, 2026
- First seen
- October 15, 2026
- Last seen
- October 16, 2026
Posting Health
- Days active
- 0
- Repost count
- 0
- Trust Level
- 79%
- Scored at
- October 16, 2026
Signal breakdown
freshnesssource trustcontent trustemployer trust
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