Nuclear Engineer, Core Physics

The role

You will design and implement nuclear-specific testing operations for a 2026 demonstration. This includes designing test campaigns, performing reactor physics calculations, and developing procedures.

What you will do

• Collect testing requirements, objectives, and success criteria from nuclear engineers.
• Develop procedures that satisfy test requirements within the operational bounds of Kaleidos.
• Perform various reactor physics calculations to verify proposed testing sequence addresses all requirements.
• Document testing procedures.
• Support operator training and control room GUI development.

Required qualifications

• Bachelor’s degree in nuclear engineering or equivalent degree from an accredited institution.
• 2+ years of experience with reactor operations.
• Experience with radiation transport methods, including with codes such as MCNP/OpenMC/Serpent.
• Knowledge of thermal hydraulic fundamentals.
• Must be willing to work extended hours and weekends as necessary.

Nice to have

• 4+ years of experience with reactor operations.
• Direct experience as a reactor operator of an existing nuclear reactor.
• Hands-on experience in developing technical procedures, human factors engineering, or operational interface design.

Benefits

• Substantial incentive stock plan for all full-time employees.
• Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
• One Medical: Sponsored memberships for employees and their dependents.
• Vision: 100% top tier plan coverage + 50% for dependents.
• Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
• Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
• 8-weeks of paid parental leave for all parents.
• Additional paid pregnancy leave for CA employees.
• Nuclear Engineering Certificate Program: 100% covered educational program with Penn State University, for eligible employees.
• Daily catered lunch.
• Free snacks and drinks.
• Flexible PTO policy.

Before you apply

• Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.

About the company

Radiant is an El Segundo, CA-based company building the world's only mass-produced, transportable nuclear microreactors. Founded in 2020, Radiant is under contract to deliver power to the U.S. Army, Navy and Air Force.