Radiant is an El-Segundo, CA-based clean energy startup building a nuclear microreactor. A climate-friendly alternative to diesel generators, Radiant's Kaleidos 1MW microreactor will be the world's first portable, zero-emissions power source that works anywhere. We plan to test our development reactor by 2026 and if successful, it will be the first new commercial reactor design to achieve a fueled test in over 50 years. Radiant's goal is to bring one of the world's first factory-constructed microreactors to market. Our microreactor can bring power to remote parts of the world and provide backup power for life-saving applications in hospitals or disaster-relief scenarios.

Senior Tooling Engineer

Radiant is seeking a highly motivated senior tooling engineer who will be working closely with design engineers and the manufacturing team to develop and innovate custom tooling to build and assemble our microreactor system. You will be part of the early team that develops production tooling for the factory that will mass produce, fuel, and refuel Kaleidos.

Responsibilities and Duties

• Partner with design and manufacturing engineers to develop innovative production tooling for fabricating and assembling complex mechanisms and structures.
• Design, analysis, and fabricate tooling that enables semi-remote operations for fueling/defueling of the reactor.
• Identify and develop appropriate suppliers for tooling components, fabrication.

Required Skills and Qualifications

• Bachelor’s degree from an accredited institution in mechanical, manufacturing, or other related engineering discipline.
• 4+ years of experience in mechanical tooling design and fabrication of multi-component assemblies in CAD (NX or similar).
• Solid understanding of Geometric Dimensioning & Tolerancing (GD&T) with experience applying it to fabrication drawings.

Desired Skills and Qualifications

• Master’s degree from an accredited institution in mechanical, manufacturing, or other related engineering discipline.
• Proficiency with both “hand calc” analytical methods and higher fidelity finite element-based analysis methods.
• Experience with custom machine design; electromechanical systems, motors, actuators, linear rails, bearings, lifting/rigging, etc.
• Self-motivated with strong organizational, written, and oral communication skills.
• Experience with custom machine design; electromechanical systems, motors, actuators, linear rails, bearings, lifting/rigging, etc.
• Strong problem-solving skills and attention to detail.
• Demonstrated ability to work collaboratively with design and operations teams.

Additional Requirements

• Must be willing to work extended hours and weekends as necessary to achieve company goals.
• Must work 100% onsite at El Segundo HQ.

Employee Benefits for Eligible Employees:

• Stock: Substantial incentive stock plan for all full time, salaried 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 are offered as employee contributed benefits.
• Free snacks and drinks onsite.
• Flexible PTO policy.

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.