Senior Fluid Systems Engineer

Radiant Nuclear

El Segundo, United States Posted October 17, 2026

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On-site Full-time Senior
Salary Range

$158,000 - $219,450

Job Description

Join Radiant, a pioneering company in the nuclear energy sector. As a Senior Fluid Systems Engineer, you will be responsible for the end-to-end engineering of critical fluid systems, including thermal hydraulic analysis, piping design, vendor selection, assembly, and testing. You will have a significant impact on the development of the first new commercial reactor design in over 50 years. This position requires a bachelor's degree in engineering, 5+ years of experience in fluid systems design, and a willingness to work onsite in El Segundo, CA.

  • Assumer la responsabilité de l'ingénierie de bout en bout des systèmes fluides et des composants, y compris les compresseurs, les vannes et les échangeurs de chaleur.
  • Effectuer des analyses thermiques et fluides complexes pour orienter les décisions de conception, vérifier les performances du système et garantir l'intégrité structurelle.
  • Développer et exécuter des instructions de fabrication/assemblage et des plans de test, et gérer un Bill-Of-Materials (BOM).
  • Bachelor’s degree from an accredited institution in Mechanical, Materials, Aeronautical, Civil or Structural Engineering
  • Experience with fluid system architecture design
  • Proficient knowledge of heat exchanger design and analysis methods
  • 5+ years of experience in designing, building, and testing fluids systems
  • Proficient knowledge in fluid dynamics and thermodynamics
  • Must be willing to work extended hours and weekends as necessary to accomplish our mission
  • Must work 100% onsite at El Segundo HQ
  • Prior experience with fluid system modeling via Matlab/Python
  • Takes extreme ownership of work and a high degree of responsibility
  • Experienced in design for manufacturability and ramping up hardware build in a production environment
  • Experience with process piping design and testing codes, such as ASME B31.3 and ASME PCC-2
  • Prior experience with designing piping system for thermal growth using hand calculations and FEA tools
  • Knowledge of thermodynamic power cycles
  • Experienced in designing and operating test stands
  • Prior nuclear experience in not required for this role
  • Excellent communication across multidisciplinary teams
Required Skills
testing system design MATLAB Python communication
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