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.
Responsibilities & Duties:
Perform general building maintenance and repair work throughout
multiple facilities.Complete preventive maintenance activities on building systems and
equipment.Perform basic plumbing repairs including faucets, toilets, valves, drains,
and fixtures.Perform basic HVAC maintenance such as filter changes, troubleshooting
support, and vendor coordination.Repair walls, doors, ceilings, flooring, cabinetry, windows, locks, and
building hardware.Assemble office furniture, shelving, storage systems, and workplace
equipment.Install whiteboards, monitors, signage, artwork, and miscellaneous office
fixtures.Support office moves, workstation reconfigurations, and space planning
activities.Perform painting, patching, drywall repairs, and finish work.
Maintain parking lots, sidewalks, loading areas, exterior grounds, and
building appearance.Support janitorial oversight and facility cleanliness initiatives.
Respond to maintenance requests and facility emergencies in a timely
manner.Assist with vendor escorts and contractor coordination.
Maintain maintenance tools, shop organization, and inventory.
Assist with facility improvement and capital construction projects.
Participate in safety inspections and continuous improvement initiatives.
Support special events, workplace setup, and operational needs as assigned.
Required Qualifications & Skills:
3+ years of commercial facilities maintenance, building maintenance,
property maintenance, or handyman experience.Experience performing a wide variety of maintenance and repair work.
Comfortable using hand tools, power tools, ladders, and maintenance
equipment.Basic knowledge of plumbing, carpentry, drywall, painting, hardware, and
general building systems.Strong troubleshooting and problem-solving skills.
Ability to prioritize work in a fast-paced environment.
Ability to lift up to 50 pounds and work on ladders, lifts, and rooftops as
needed.Valid driver’s license.
Desired Qualifications & Skills:
Experience supporting manufacturing, aerospace, laboratory, semiconductor, industrial, or technology facilities.
Experience working alongside contractors and construction teams.
Forklift, scissor lift, or boom lift experience.
Experience using CMMS or maintenance management software.
OSHA 10 or OSHA 30 certification.
Experience working in a startup environment.
Basic electrical and HVAC troubleshooting experience.
Success in the First 3 Months:
Become familiar with all Radiant facilities and building systems.
Establish strong relationships with internal customers and vendors.
Complete preventive maintenance tasks on schedule.
Improve response times for maintenance requests.
Maintain a clean, organized, and professional appearance across all
facilities.Support ongoing capital projects and workplace improvements.
Identify opportunities to reduce maintenance costs by performing work in-
house while maintaining high-quality standards.
Additional Requirements:
Must be willing to work extended hours and weekends as necessary to accomplish our mission.
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.