About the role#
Radiant is seeking a Tooling Engineer Intern to join our team in El Segundo. You will work on production tooling for our portable nuclear microreactors, helping us build the systems needed to fabricate and assemble complex structures.
What you'll do#
- Work with design and manufacturing engineers to create production tooling.
- Design, analyze, and build tools that support semi-remote operations for reactor fueling and defueling.
- Find and manage suppliers for tooling components and fabrication needs.
What you'll need#
- Currently pursuing a BS or MS in Mechanical, Manufacturing, or Aerospace Engineering.
- Experience with custom machine design, including electromechanical systems, motors, actuators, linear rails, bearings, and lifting or rigging equipment.
- A solid grasp of hand calculation methods and finite element analysis.
- Strong problem-solving skills and attention to detail.
- Ability to work well with design and operations teams.
- Strong written and verbal communication skills.
Location & details#
- This is a full-time, paid internship for Summer 2027.
- The role is based 100% on-site at our headquarters in El Segundo, California.
- This position involves access to technology subject to U.S. export controls. Offers are contingent upon your ability 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.



