Valar Atomics
Senior Thermal-Hydraulics Analysis Engineer
$151K–$185K
Torrance, CA +1 · Senior · Full-time · Posted Jul 29, 2026
- Location
- Torrance, CA
Torrance, California, United States - Experience
- 5+ years; includes lead responsibility on integrated system or cycle models.
- Education
- Bachelor's degree or higher in Mechanical, Nuclear, Chemical or Aerospace Engineering with emphasis on thermodynamics, heat transfer or thermal-hydraulics systems.
- Visa sponsorship
- Applicants must be legally authorized to work in the United States as a U.S. citizen or lawful permanent resident (green card holder).
About the job
Leads system-level thermal-hydraulics modeling of reactor loops, plant systems, and power-conversion cycles to support design, performance, safety, and optimization.
What you'll do
- Build and maintain Flownex SE models for steady-state and transient plant analysis; validate models and set modeling standards.
- Analyze component performance, power-cycle optimization, plant transients, and control response; coordinate inputs with CFD, FEA, and neutronics work.
- Prepare NQA-1 calculation and design-basis documentation, support safety and regulator/customer reviews, and mentor junior analysts.
What they ask for
- Bachelor’s degree or higher in Mechanical, Nuclear, Chemical, or Aerospace Engineering, emphasizing thermodynamics, heat transfer, or thermal-hydraulics systems.
- 5+ years of professional thermal-hydraulics or plant-systems analysis experience, including lead responsibility on integrated system or cycle models.
Nice to have
- Master’s degree (MSc/MEng) or higher in a relevant engineering field.
- Flownex SE expertise, or depth in a comparable systems/transient code with willingness to adopt Flownex.
Pay
$151,000 — $185,000 USD (base salary)
Tools
Flownex SE, RELAP5, TRACE, GOTHIC, MELCOR, Modelica/Dymola, Aspen HYSYS Dynamics, Thermoflow / GateCycle
Model-written summary · the original posting is authoritative