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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)
FILLED
Radiant
Electrical
Electrical Engineer - PCB
El Segundo, CA Internship
2 weeks ago
Electrical
2 weeks agoFILLED
Radiant
Mechanical
Electrical Engineer, PCB Design
El Segundo, CA Internship
3 weeks ago
Mechanical
3 weeks agoFILLED
Radiant
Mechanical
Senior Electrical Engineer, PCB Design
El Segundo, CA Full Time
3 weeks ago
Mechanical
3 weeks agoFILLED
Radiant
Operations
Physical Security Manager
El Segundo, CA Full Time
1 month ago
Operations
1 month agoFILLED
Radiant
Electrical
Summer 2026 Internship - Electrical Engineering (Facilities)
El Segundo, CA Internship
1 month ago
Electrical
1 month agoFILLED
Radiant
Electrical
Summer 2026 Internship - Electrical Engineering
El Segundo, CA Internship
1 month ago
Electrical
1 month agoFILLED
Radiant
Entry LevelManufacturing
Tooling Engineer - 2026 New Graduate
El Segundo, CA Internship
1 month ago
Entry LevelManufacturing
1 month agoFILLED
Radiant
Software
Summer 2026 Internship - Software Engineering
El Segundo, CA Internship
1 month ago
Software
1 month agoFILLED
Radiant
Entry LevelMechanicalStructures
Mechanical Engineer, Structures - 2026 New Graduate
El Segundo, CA Internship
1 month ago
Entry LevelMechanicalStructures
1 month agoFILLED
Radiant
Entry LevelMechanical
Mechanical Engineer, Mechanisms - 2026 New Graduate
El Segundo, CA Internship
1 month ago
Entry LevelMechanical
1 month agoFILLED
Radiant
Operations
Environmental, Health & Safety (EHS) Manager
El Segundo, CA Contract
2 months ago
Operations
2 months agoFILLED
Radiant
Avionics
Senior FPGA Verification Engineer (CONTRACT)
El Segundo, CA Contract
2 months ago
Avionics
2 months agoFILLED
Radiant
Supply Chain
Warehouse Operations Specialist
El Segundo, CA Full Time
2 months ago
Supply Chain
2 months agoFILLED
Radiant
Legal & Compliance
State Engagement Manager
Washington, D.C. Full Time
2 months ago
Legal & Compliance
2 months agoFILLED
Radiant
Entry LevelElectrical
Electrical Engineer - 2026 New Graduate
El Segundo, CA Internship
3 months ago
Entry LevelElectrical
3 months agoReady to start your space career at Radiant?
