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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
Supply Chain
Director, Supply Chain Management – Kaleidos
El Segundo, CA$161K - $236K Full Time
2 days ago
Supply Chain
2 days agoRadiant
Aerospace Engineering
Factory Integration Lead
Oak Ridge, TN$155K - $256K Full Time
3 days ago
Aerospace Engineering
3 days agoRadiant
Mechanical
Build Engineer, Turbomachinery
El Segundo, CA$74K - $130K Internship
4 days ago
Mechanical
4 days agoRadiant
Mechanical
Structural Analyst, Turbomachinery
El Segundo, CA$125K - $173K Full Time
4 days ago
Mechanical
4 days agoRadiant
Entry LevelMechanical
Mechanical Engineer, Motor Design - 2026 New Graduate
El Segundo, CA$95K - $105K Full Time
4 days ago
Entry LevelMechanical
4 days agoRadiant
Business & Finance
Executive Assistant
El Segundo, CA$115K - $162K Full Time
5 days ago
Business & Finance
5 days agoRadiant
Software
Staff Data Platform Engineer, Enterprise Data
El Segundo, CA$158K - $247K Full Time
1 week ago
Software
1 week agoRadiant
Aerospace Engineering
Systems Integration Engineer
El Segundo, CA$86K - $122K Full Time
2 weeks ago
Aerospace Engineering
2 weeks agoRadiant
Legal & Compliance
Chief of Staff
Washington, D.C.$155K - $256K Full Time
2 weeks ago
Legal & Compliance
2 weeks agoRadiant
MechanicalThermal
Senior Thermal Analyst
El Segundo, CA$140K - $225K Full Time
2 weeks ago
MechanicalThermal
2 weeks agoRadiant
MechanicalThermal
Senior Thermal Engineer
El Segundo, CA$140K - $225K Full Time
2 weeks ago
MechanicalThermal
2 weeks agoRadiant
MechanicalThermal
Senior Thermal Modeling Analyst
El Segundo, CA$140K - $225K Full Time
2 weeks ago
MechanicalThermal
2 weeks agoRadiant
MechanicalThermal
Senior Thermal-Hydraulics Engineer
El Segundo, CA$140K - $225K Full Time
2 weeks ago
MechanicalThermal
2 weeks agoRadiant
MechanicalThermal
Senior Thermal Modeling Engineer
El Segundo, CA$140K - $225K Full Time
2 weeks ago
MechanicalThermal
2 weeks agoRadiant
Software
Senior Controls Systems Engineer
El Segundo, CA$158K - $219K Full Time
2 weeks ago
Software
2 weeks agoReady to start your space career at Radiant?
