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Radiant
77 open27 filled
El Segundo, California, United StatesFounded 2019207+ employeesGrowth raisedGrowthPrivate
Last round: series d · Feb 2026(6 rounds total)
Founded by Bob Urberger, Doug Bernauer“Radiant develops a portable and zero-emissions power source that works anywhere. Its patented portable nuclear microreactor is the brainchild of former SpaceX engineers who have experience quickly bringing real products and innovations to the market. Radiant can offer a low-cost, portable renewable power source that can be an alternative to fossil fuels for both military and commercial applications.”
Backed by(41 investors)
Lockheed Martin VenturesAndreessen HorowitzBoost VCDCVCDraper AssociatesUnion Square VenturesChevron Technology VenturesFriends & Family CapitalWashington Harbour PartnersARK Venture FundIQTManhattan Venture Partners (MVP)Sahin BoydasFounders FundAlumni Ventures
Radiant is a 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. 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.
Open Positions at Radiant (77 Jobs)
Radiant
Electrical
Senior Power Electronics Engineer
El Segundo, CA$158K - $219K Full Time
1 month ago
Electrical
1 month agoRadiant
Mechanical
Senior Mechanisms Engineer
El Segundo, CA$134K - $185K Full Time
1 month ago
Mechanical
1 month agoRadiant
Supply Chain
Operations Planner
El Segundo, CA$115K - $168K Full Time
1 month ago
Supply Chain
1 month agoRadiant
Entry LevelMechanical
Mechanical Engineer, Fluid Systems - 2026 New Graduate
El Segundo, CA$95K - $105K Internship
1 month ago
Entry LevelMechanical
1 month agoRadiant
Legal & Compliance
Senior Manager, Legislative Affairs
Washington, D.C.$123K - $173K Full Time
1 month ago
Legal & Compliance
1 month agoRadiant
Software
Senior Network Security Engineer
El Segundo, CA$134K - $190K Full Time
1 month ago
Software
1 month agoRadiant
People & HR
Senior Technical Recruiter (Contract)
El Segundo, CA$55 - $91/hour Contract
1 month ago
People & HR
1 month agoRadiant
Supply Chain
System Administrator - MES, Procurement, TestOps
El Segundo, CA$101K - $143K Full Time
1 month ago
Supply Chain
1 month agoRadiant
Operations
Senior People Business Partner
El Segundo, CA$115K - $168K Full Time
1 month ago
Operations
1 month agoRadiant
Sales & Marketing
Senior Brand Design & Content Manager
El Segundo, CA$115K - $191K Full Time
1 month ago
Sales & Marketing
1 month agoRadiant
Mechanical
Mechanical Engineer, Fluid Systems
El Segundo, CA$108K - $151K Full Time
1 month ago
Mechanical
1 month agoRadiant
Mechanical
Senior Materials Engineer (Metallurgy)
El Segundo, CA$134K - $185K Full Time
1 month ago
Mechanical
1 month agoRadiant
Technician
Manager of Quality Control
El Segundo, CA$123K - $173K Full Time
1 month ago
Technician
1 month agoRadiant
Aerospace Engineering
Lead Nuclear Engineer
El Segundo, CA$141K - $237K Full Time
2 months ago
Aerospace Engineering
2 months agoRadiant
Operations
Construction Manager
Oak Ridge, TN$115K - $191K Contract
2 months ago
Operations
2 months agoReady to start your space career at Radiant?
