Radiant
Senior Thermal Modeling & Analysis Engineer
$140K–$225K
El Segundo, CA · On-site · Senior · Full-time · Posted Aug 7, 2026
- Experience
- 5+ years of relevant thermal, CFD, or thermal-fluid analysis experience.
- Education
- Bachelor’s degree in mechanical, aerospace, nuclear engineering, physics, or a related field.
- Visa sponsorship
- Any job offer is contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
About the job
Own high-fidelity thermal and CFD modeling for the Kaleidos microreactor, using analyses and test correlation to inform system design, operating limits, and safety margins.
What you'll do
- Lead thermal and CFD analyses from problem definition through validation, documentation, and design recommendations.
- Assess steady-state, transient, and off-normal thermal-fluid behavior; verify models and correlate them with test data.
- Build automated simulation workflows and reduced-order models, and communicate findings to cross-functional teams.
What they ask for
- Bachelor’s degree in mechanical, aerospace, nuclear engineering, physics, or a related field.
- 5+ years of relevant thermal, CFD, or thermal-fluid analysis experience.
- Extensive experience with STAR-CCM+, Ansys Fluent, or comparable CFD software.
- Experience with steady-state and transient analyses, model verification, sensitivity studies, and validation or test correlation.
Nice to have
- Experience with high-temperature gas systems, nuclear reactors, propulsion, turbomachinery, or other complex energy systems.
- Experience with thermal FEA, coupled fluid-thermal-structural analysis, radiation modeling, reduced-order models, or high-performance computing.
Pay
$139.5K – $224.7K USD base salary
Tools
STAR-CCM+, Ansys Fluent, Siemens NX, Python
Model-written summary · the original posting is authoritative