Radiant Industries

Thermal Modeling Engineer

El Segundo, CA · Contract

Sponsorship not specifiedDetected 56 days ago

HRISSiemens NXANSYSFEACFDThermal AnalysisMechanical Design

About the role

The company's first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling.
Thermal Modeling Engineer (CFD) Radiant is seeking a driven Thermal Modeling Engineer with expertise in CFD and thermal FEA modeling.
You'll work on cutting edge technical problems for a high temperature gas reactor that inform decisions across reactor systems, cooling systems, shielding, and more.

Develop and execute thermal analysis and CFD to evaluate design and performance of Kaleidos systems.
Document analysis results to communicate clear and actionable outputs.
Own pipeline for producing analysis geometry from mechanical design CAD
Develop methods and calculations to support and build confidence in lower-fidelity thermal analysis methods.
Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors.
Radiant's unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.
You will design, develop and implement simulations for the Kaleidos microreactor to ensure high fidelity, reliability, and safety of our systems.
You will have an opportunity to work in an interdisciplinary environment and drive milestones forward to unlock commercialization of the first mass-produced nuclear reactor.

Must be willing to work extended hours and weekends as necessary to accomplish our mission.

Bachelor's degree in engineering, physics, or similar field from an accredited institution.
3+ years experience with Star CCM+ or Ansys Fluent.
Proficiency with CAD software (Siemens NX).
Strong understanding of finite element and computational fluid dynamics modeling principles and methods.
Experience communicating and distilling information with cross-functional teams.
Desired Qualifications and
Experience with radiation heat transport modeling.
Knowledge of nuclear reactor design.
Driven, self-motivated, and takes ownership of work end to end.
Additional Requirements
Must work 100% onsite at El Segundo HQ.
Stock: Substantial incentive stock plan for all full-time employees.

100% top tier plan coverage + 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.
Flexible PTO policy.

recruiting@radiantnuclear.com.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
This position involves access to technology that is subject to U.S. export controls.
Any job offer made will be contingent upon the applicant's capacity to serve in compliance with U.S. export controls.
Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.

This listing is sourced directly from Radiant Industries's careers page and normalized into a canonical job model.