Radiant
Mechanisms Engineer
$134K–$185K
El Segundo, CA · On-site · Full-time · Posted Oct 12, 2026
- Experience
- 3+ years designing mechanisms and 3+ years performing stress analysis; both are required.
- Education
- Bachelor’s degree from an accredited institution in Mechanical or Aeronautical Engineering.
- Visa sponsorship
- The position involves access to technology subject to U.S. export controls; any job offer is contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
About the job
Design, analyze, build, integrate, and test critical mechanisms for Radiant’s Kaleidos nuclear microreactor, including systems that control reactivity or actuate safety features.
What you'll do
- Own critical mechanism and subassembly design, manufacturing, and test schedules; conduct trade studies and select materials.
- Perform thermomechanical and kinematic analyses using hand calculations and finite element tools; manage subsystem FMEA and BOMs.
- Develop manufacturing, assembly, and test plans; find suppliers and coordinate requirements with other engineering teams.
What they ask for
- Bachelor’s degree in Mechanical or Aeronautical Engineering from an accredited institution.
- 3+ years of experience designing mechanisms.
- 3+ years of experience performing stress analysis using hand calculations and finite element tools (Abaqus, Ansys, FEMAP, or similar).
- Must work 100% onsite at El Segundo HQ and be willing to work extended hours and weekends as necessary.
Nice to have
- Experience with multi-component CAD assemblies (NX or similar), manufactured and iteratively improved hardware, pneumatic systems, or electromechanical components.
- Experience with interdisciplinary teams, GD&T, finite element analysis, free-body diagrams, or text-based software development tools.
Pay
$133.5K – $184.8K (base salary)
Tools
Abaqus, Ansys, FEMAP, NX
Model-written summary · the original posting is authoritative