About the role#
Radiant is hiring a Nuclear Engineer Intern for Summer 2027 to join our Engineering Research and Development team. You will contribute to the design and analysis of our portable nuclear microreactors, specifically the Kaleidos project. This is a full-time, on-site position based in El Segundo, California.
What you'll do#
- Assist with nuclear design and analysis tasks, including shielding, neutronics, thermal, and fuel-related studies.
- Support coupled neutronics and thermal calculations to refine system performance models.
- Develop lower order shielding analysis models to create rapid shielding design solutions.
- Work on uncertainty propagation methodology and its execution on the Kaleidos Demonstration Unit.
- Perform criticality safety analysis for the Production Plant of Kaleidos reactors.
- Collaborate with cross-functional teams and provide technical input as projects evolve.
- Document your methods, results, and findings in technical reports and presentations.
- Present a final project review to engineers and leadership at the end of the internship.
What you'll need#
- Currently pursuing a BS or MS in Mechanical Engineering, Nuclear Engineering, or a related discipline.
- A strong academic foundation in nuclear engineering principles such as reactor physics, thermal-hydraulics, and radiation shielding.
- Proficiency in at least one programming language like Python, C++, or C#.
- Hands-on experience through coursework, research, projects, or labs in nuclear system design or analysis.
- Familiarity with nuclear simulation codes such as OpenMC, Serpent, MCNP, MOOSE, BISON, RELAP, CFD, Pronghorn, or GRIFFIN.
- Prior software development experience or exposure to version control, testing, and documentation practices.
- Strong communication skills and the ability to work well in a collaborative team.
- Interest in our mission to deploy nuclear microreactors to provide clean energy in remote locations.
Location & details#
- Location: El Segundo, California (100% on-site).
- Term: Summer 2027.
- Compensation: 34 to 40 dollars per hour.
- Status: Full-time internship.
- Note: This position involves access to technology subject to U.S. export controls. Any job offer is contingent upon your capacity to serve in compliance with these regulations.
About Radiant
Radiant produces portable nuclear microreactors. The company is based in El Segundo, California and employs between 51 and 200 people. It was founded in 2020. The firm is currently developing a 1 MW failsafe microreactor known as Kaleidos.
How to get in at Radiant
Applying early to Radiant gives you a clear advantage because recruiters review applications as they arrive. Intern Insider sends an instant alert the moment a role is published, so you can apply among the first before the pile grows. You should aim to reach out to the recruiters behind these roles directly to ask about the position or a referral, as this approach often improves response rates. Intern Insider surfaces these specific contacts for you, helping you move past the standard queue.
