About Radiant

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, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. 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 leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.

Radiant is seeking a Senior Engineering Technician who will have the opportunity to apply a variety of skillsets while fabricating and assembling our development microreactor unit. Additionally, you will be instrumental in building large and small-scale test rigs, making prototype parts and tooling, sourcing tools to execute builds, material handling, and more. You will be the fourth foundational technician team member at Radiant with a high degree of autonomy and initiative is needed. You will build and maintain our prototype shop in our new El Segundo headquarters and use a variety of tools as it comes to shop activities (Machining, welding, metal forming, electrical work, plumbing). You’ll have the opportunity to bring significant technical contribution to the team and lead us to the successful fueling of a new reactor design in over 50 years by 2026.

Responsibilities and Duties:

• Fabricate piece parts to print using shop equipment: mill, lathe, welders, metal forming tools, hand tools, etc.

• Own the assembly and commissioning of test rigs and production builds.

• Perform troubleshooting and root cause investigation of mechanical, electrical, thermal, and pneumatic issues.

• Partner and collaborate with engineers to develop solutions and improvements for hardware design, fabrication, and assembly.

• Abide by a high level of operational standards regarding safety, reliability, and cleanliness.

• Perform other tasks as needed. We are a small company, and you may need to perform tasks outside your normal duties and responsibilities.

Required Skills and Qualifications:

• High school diploma or equivalent certificate.

• 5+ years of fabrication or assembly work experience.

• Positive attitude and able to work well on a team.

• Able to work independently and efficiently with minimal supervision.

• Able to stay organized and strong attention to detail.

• Able to use traditional inspection tools for the inspection of parts and assemblies.

• Able to read mechanical drawings and interpret tolerances.

• Able to read and interpret fluid or electrical schematics.

• Experienced in manufacturing with the use of machine tools, saws, grinders etc.

• Physical effort including standing, lifting, and carrying equipment up to 50 lbs. unassisted.

• Able to work in outdoor environments as needed.

• Ability to work at elevated heights occasionally (scissor lifts, ladders, etc.)

• Ability to travel on occasion for offsite support.

Desired Skills and Qualifications:

• Experience operating and working with high pressure and temperature systems.

• Experience with MIG and TIG welding.

• Experience with CNC programming and manual machine operation.

• Experience with GD&T interpretation preferred.

• Knowledge/experience working with electrical components and high voltage systems.

• Experience operating safely in shop environments.

• Experience lifting, rigging, and preparing for heavy crane operations of complicated parts.

• Proficient computer skills; comfortable with using email and the Microsoft Office suite.

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.

Benefits and Perks

• 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.

Total Compensation and Benefits
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: recruiting@radiantnuclear.com.

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.

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.