Lead Electrical Motor Design Engineer

Radiant is seeking a Lead Electrical Motor Design Engineer to own the architecture, technical direction, and execution of high-speed alternators and primary loop motors for our nuclear‑driven power generation systems. This role leads the electric machine design function responsible for our 1MW high‑speed rotating machinery central to commercializing Earth’s first mass‑produced nuclear reactors.

You will set the technical vision for motor design while guiding structural, thermal, and system integration efforts. As a player‑coach, you will both contribute directly to design work and mentor a team of engineers to deliver safe, reliable, and production‑ready generator systems.

This is a hands‑on technical leadership role with significant cross‑functional influence.

• Own system‑level architecture and technical roadmap for 1MW, 30krpm alternators and primary loop motors
• Lead electromagnetic design of permanent magnet machines for closed‑loop Brayton cycle power systems
• Define and flow down generator requirements from system‑level constraints
• Establish best practices for modeling, simulation, validation, and documentation
• Make key technical decisions on topology selection, magnetics, insulation systems, cooling strategies, and manufacturability
• Ensure designs meet performance, reliability, safety, and regulatory requirements

• Lead and mentor a team of motor design engineers
• Conduct design reviews and provide guidance on electromagnetic, structural, and thermal analysis
• Drive technical prioritization, risk management, and execution planning
• Build engineering rigor, documentation standards, and repeatable development processes

• Partner closely with turbo machinery, power electronics, thermal, packaging, and software teams
• Optimize electromechanical interfaces between generator, inverter, and control systems
• Collaborate with manufacturing to transition from prototype to scalable production
• Own technical engagement with external vendors and suppliers

• Oversee development and qualification testing of electric machines
• Guide bench, dynamic, and system‑level testing campaigns
• Lead root cause analysis and rapid design iteration cycles
• Maintain hands‑on involvement in assembly, integration, and troubleshooting as needed

• B.S. in Electrical Engineering or Mechanical Engineering with specialization in electric machines or rotating machinery
• 5+ years of experience designing high‑voltage, high‑power electric motors and/or generators
• Demonstrated expertise in permanent magnet motor design for +1kV, +1MW applications operating at up to 40,000 rpm
• Strong proficiency with electromagnetic analysis tools (Ansys Motor‑CAD, Maxwell, or equivalent)
• Experience with structural and thermal analysis of high‑speed rotating machinery
• Deep understanding of motor–inverter interactions and power electronics integration
• Experience leading complex electromechanical development efforts
• Hands‑on experience with assembly, integration, and testing of electric machines

• 10+ years of generator design experience
• M.S. or Ph.D. in Electrical or Mechanical Engineering
• Knowledge of motor control systems including SVM
• Experience scaling hardware from prototype to production
• Prior experience leading small, high‑performance engineering teams
• Experience defining engineering standards and technical processes

• Strong system‑level thinking and architectural judgment
• Ability to balance technical depth with execution speed
• Clear communicator capable of aligning cross‑functional teams
• High ownership mindset and mission‑driven motivation
• "One team" mentality across engineering disciplines

• 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:…