Senior Motor Design Engineer - Mechanical

Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt failsafe microreactor that can be transported anywhere power is needed and run for up to five years without the need to refuel. Portable nuclear power with rapid deploy capability can replace similar-sized diesel generators, and provide critical asset support for hospitals, data centers, remote sites, and military bases.

Radiant’s unique, practical approach to nuclear development utilizes modern software engineering to rapidly achieve safe, factory-built microreactors that leverage existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor next year at the Idaho National Laboratory, with initial customer deliveries beginning in 2028.

Radiant is seeking a talented Senior Electric Motor Design Engineer to design and develop an alternator for the nuclear-driven, high-speed power generator. Responsibilities include but are not limited to the design and analysis of active parts within the high-speed generator. You will collaborate with engineers cross-functionally and partner closely with the turbo machinery team developing a system for converting mechanical energy to electrical to be delivered to customers safely and reliably.

The successful candidate will own active part design of generators, along with performing analysis, simulation, and component selection. You’ll make a big impact in commercializing Earth's first mass-produced nuclear reactors and power remote areas and critical infrastructure with abundant clean energy.

• Own design, development, and integration of 1MW alternator
• Create 3D models and 2D fabrication drawings in CAD and NX.
• Own communications with vendors to source all components to build the generator.
• Perform bench testing, dynamic testing, and system testing for all subsystem components and models.
• Perform hands‑on assembly, rapid prototyping, and integration of high voltage electric motors and generators.

• B.S. in mechanical engineering specializing in electric motors
• 5+ years of design experience designing high-voltage and high-power electric motors and/or generators.
• Fundamental knowledge of permanent magnet electric motors.
• Experience in design, manufacturing, and assembly of electric motors.

• 8+ years of generator design.
• M.S in Mechanical Engineering specializing in electric motors.
• Knowledge of motor control systems including SVM.
• Great team player with one team mentality working with turbo machinery, power electronics, thermal, packaging and software teams.

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

This is an exempt salaried role.

$158,000 - $247,275 USD

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:

• Stock:
  Substantial incentive stock plan for all full‑time employees.
• Medical: 100% premium coverage for base Silver level plan for employee + 50% premium coverage for dependents. Platinum plans available.
• One Medical:
  Sponsored memberships for eligible employees and their dependents.
• Vision: 100% premium coverage for top tier plan + 50% for dependents.
• Dental: 100% premium coverage for top tier plan (including orthodontia) + 50% for dependents.
• Voluntary life, accident, hospital, critical…