Mechanical Engineer - Turbomachinery

Radiant is seeking a highly motivated engineer to join the team responsible for the power generation and primary cooling turbo machinery of our Kaleidos product. This role involves performing the mechanical design and analysis of high-speed rotating machinery including compressors, turbines, and pumps for high-temperature applications. The ideal candidate should have strong first principles in structures, fluids, and thermodynamics. Hands‑on engineering experience through internships, co‑op programs, research projects, or team‑based design competitions (e.g., SAE, ASME, Formula SAE) is a strong advantage.

• Design, build, and test turbo machinery for Radiant’s power generation systems.
• Develop detailed mechanical designs for turbo machinery components, including rotors, stators, housings, and seals.
• Perform static and dynamic structural analyses using hand calculations and FEA tools (ANSYS, Abaqus, or equivalent) to assess stresses, deformations, and fatigue life.
• Prepare technical reports, design documentation, and presentation materials.
• Support the build and testing of prototype, first article, and production hardware.

• Bachelor’s or Master’s degree in Mechanical Engineering or a related field.
• 2+ years of experience in the design and analysis of turbo machinery, rotating equipment, or mechanisms.
• Proficiency in CAD and FEA tools (Solid Works, ANSYS, Abaqus, etc.), including knowledge of GD&T.
• Excellent problem‑solving, technical communication, and organizational skills.

• Prior experience with power generation applications.
• Knowledge of material selection for high‑temperature, high‑speed applications.
• Hands‑on experience with turbo machinery testing and/or instrumentation.
• Experience with one or more turbo machinery specializations (structures, heat transfer, rotor dynamics, etc.)
• Familiarity with relevant industry standards (API, ASME, ISO).
• Prior nuclear experience is not required for this role.

• Must be willing to work extended hours and weekends as necessary to accomplish our mission.
• Must work 100% onsite at El Segundo HQ.

• Stock:
  Substantial incentive stock plan for all full‑time employees.
• Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
• One Medical:
  Sponsored memberships for employees and their dependents.
• Vision: 100% top tier plan coverage + 50% for dependents.
• Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
• Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
• 8‑weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
• Daily catered lunch. Free snacks and drinks.
• Flexible PTO policy. Remote workday allocation.
• Company and team‑bonding events, happy hours and in‑person camaraderie.
• Beautiful El Segundo headquarters close to the Pacific Ocean.

Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.

The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities:

We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls.

Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $124,500 - $172,725