Director of Mechanical Engineering

Los Angeles, CA

Radiant Industries is an El Segundo, CA-based startup developing Kaleidos, a portable, containerized nuclear microreactor. Portable nuclear power with rapid deploy capability can replace diesel generators used today to provide critical asset support for hospitals, datacenters, and military bases or to power microgrids at remote sites. Radiant’s unique practical approach to nuclear development utilizes modern software engineering to rapidly achieve safe, factory-constructable microreactors leveraging existing, well-qualified materials.

Radiant partners with multiple national laboratories and universities and has won awards from the Department of Energy and the Department of Defense.  With this outside support and our unique engineering approach, we are on a fast track to demonstrate the first fueled operation of a new commercial nuclear reactor design in the digital era, just 4 years from today.

Radiant is seeking a talented engineer to be a direct contributor while leading the mechanical design team.  The ideal candidate is interested in the mission of bringing new nuclear to fueled testing and in growing a team under their leadership. Our engineering process relies on a multidisciplinary approach by interaction with software, electrical, fluids, and nuclear teams.

Responsibilities & Duties

  • Own prototype unit build schedule, manage the mechanical engineering team to efficiently execute the strategy, removing roadblocks and adapting to shifting priority
  • Identify and manage risks in the design and development process and communicate to ensure they are addressed properly
  • Report directly to the CEO, develop mechanical engineering strategy, grow the team as the company scales in size
  • Provide expertise to engineers in nuclear, fluids, electrical, and software teams
  • Interact with Universities, National Labs, and other outside entities to accomplish key objectives
  • Engineering ownership of Mechanical Design, Conduct structural analysis, risk analysis (FMEA)
  • Develop process within the mechanical engineering team to efficiently achieve rapid design/review/build iteration cycles
  • Minimum 10 years of experience designing hardware that was manufactured, deployed, and iteratively improved.
  • Minimum of 5 years managing a technical project or team
  • Deep understanding of full lifecycle engineering ownership of complex subassemblies:
    • Stakeholder identification, requirements definition, concept development, sizing, detail design, engineering drawing creation, risk analysis, supplier development, schedule and cost ownership, hands-on prototype assembly, performance test execution, troubleshooting, and rapid iteration.
  • Ability to accurately project cost and schedule for complex subassemblies and to identify and manage project critical path
  • Solid first-principles analysis skillset
    • Proficiency with both “hand calc” analytical methods and higher fidelity Finite Element based analysis methods. Track record of appropriate fidelity selection, based on engineering questions to be answered.
    • Able to efficiently and accurately derive free-body diagram-based models and control volume-based models for systems with which one was not previously familiar.
  • Ability to relocate to Radiant’s office in El Segundo, CA (Greater Los Angeles Area).
  • Ability to work or gain permission to work on export - controlled technologies based in the United States.
  • Minimum 5 years’ experience using thermal / structural Finite Element Model (FEM) packages: NASTRAN, ANSYS, ABAQUS, or similar in the context of product design.
    • Experience with static linear and non-linear material solutions, large deformation non-linear geometry solutions, stiffness and stability solutions, transient solutions, multi-step solutions, modal solutions, and random vibe solutions. Experience with a
    • Effective model complexity management for rapid iteration, without sacrifice in fidelity.
    • Able to validate results against known analytical solutions.
  • Minimum 1 year of software development experience
    • C, C++, or Python development experience is preferred, as these languages are supported natively within Radiant’s HIL(Hardware-In-the-Loop) simulation framework.
    • Prior use of code repositories, unit testing, performance benchmarking, and software review / release processes. Familiarity with good documentation practices and implementation of style guidelines.

Required Qualifications & Skills

  • Hold a bachelor’s degree in mechanical engineering, aerospace engineering, civil engineering, physics, or similar field from an accredited institution

Desired Qualifications & Skills


Stock: Substantial incentive stock plan for all salaried employees

Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.

Vision: 100% coverage + 50% for dependents

Dental: 100% coverage, orthodontia extra, 50% for dependents

Voluntary Life, Accident, Hospital, Critical Illness, Commuter and FSA are offered as employee contributed benefits.

Vacation/Sick time