Radiant
Senior Thermal-Hydraulics Engineer
$140K–$225K
El Segundo, CA · On-site · Senior · Full-time · Posted Aug 7, 2026
- Experience
- 5+ years of relevant industry experience; 5+ years of experience with STAR-CCM+, Ansys Fluent, or other commercial CFD code.
- Education
- Bachelor’s degree in engineering, physics, or similar field from an accredited institution.
- Visa sponsorship
- Any job offer is contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
About the job
Designs and runs thermal-hydraulics simulations for Radiant’s Kaleidos microreactor to assess system performance, reliability, and safety.
What you'll do
- Execute thermal CFD analyses of reactor systems and model turbulent flow, heat transfer, and multiphysics interactions.
- Establish CFD best practices and build automated simulation workflows.
- Collaborate across disciplines on design and reduced-order analysis methods.
What they ask for
- Bachelor’s degree in engineering, physics, or a similar field from an accredited institution.
- 5+ years of relevant industry experience.
- 5+ years of experience with STAR-CCM+, Ansys Fluent, or other commercial CFD code.
- Proficiency with CAD software (Siemens NX) and mastery of finite element and computational fluid dynamics modeling principles and methods.
Nice to have
- Experience with radiation heat transport modeling.
- Knowledge of nuclear reactor design.
Pay
$139.5K – $224.7K USD total pay
Tools
STAR-CCM+, Ansys Fluent, Siemens NX
Model-written summary · the original posting is authoritative