Senior Tooling Engineer — Onsite Nuclear Manufacturing

Radiant industries; El Segundo (CA); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Stock plan for all full-time employees

Comprehensive medical plans

One Medical memberships

Vision and dental coverage

Voluntary life insurance

Parental leave (8 weeks)

Flexible PTO

Catered lunch daily

Job summary

Radiant is seeking a Senior Tooling Engineer to collaborate with design and manufacturing teams to develop and innovate production equipment for the factory that will mass produce, fuel, and refuel our microreactor system. The role anchors on-site at El Segundo HQ and focuses on fabricating complex mechanisms for assembly.

You will design and analyze tooling for semi-remote fueling/defueling operations, partner with suppliers, and drive fabrication drawings using CAD tools like NX, with a strong

Qualifications

• Bachelor’s degree in mechanical, manufacturing, or related engineering discipline.
• 4+ years of experience in mechanical equipment 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.

Responsibilities

• Partner with design and manufacturing engineers to develop production equipment for fabricating and assembling complex mechanisms and structures.
• Design, analyze, and fabricate equipment enabling semi-remote fueling/defueling of the reactor.
• Identify and develop appropriate suppliers for components and fabrication.

Skills

Bachelor’s degree

CAD NX

GD&T

4+ years experience

Education

Bachelor’s degree in mechanical engineering

Tools

NX CAD

Job description

About Radiant

Radiant is an El Segundo, CA-based company building the world's only mass-produced, transportable nuclear microreactors. The U.S. grid is under growing strain, with power demand accelerating, driving higher utility costs, rising carbon emissions, and interconnection backlogs. Radiant has a solution, transportable, on-site power. Our first reactor, Kaleidos, is 1 megawatt: small enough to be factory-built, transported by land, sea, or air, and deployed wherever power is needed. 1 MW can power 1000 homes for five years. Ship it back and we refuel for a 20 year operating life. We made energy a product that can be used for critical infrastructure like military bases, data centers, hospitals, and remote sites, as well as the commercial main street businesses that keep America running. Founded in 2020, Radiant is under contract to deliver power to the U.S. Army, Navy and Air Force and has signed pre-order agreements with Equinix, with deployments beginning in 2028.

About the Role

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 equipment to build and assemble our microreactor system. You will be part of the early team that develops production equipment for the factory that will mass produce, fuel, and refuel Kaleidos.

Responsibilities & Duties:

• Partner with design and manufacturing engineers to develop innovative production equipment for fabricating and assembling complex mechanisms and structures.

• Design, analyze, and fabricate equipment that enables semi-remote operations for fueling/defueling of the reactor.

• Identify and develop appropriate suppliers for components and fabrication.

Required Qualifications & Skills:

• Bachelor’s degree from an accredited institution in mechanical, manufacturing, or other related engineering discipline.

• 4+ years of experience in mechanical equipment 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 Qualifications & Skills:

• 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.

• 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.

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: [e-mail].

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.