Radiant is building the world’s first mass-produced portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1 MW failsafe microreactor that can be transported anywhere power is needed. Founded in 2020, Radiant plans to test its first reactor in 2026, with initial customer deployments beginning in 2028.

Director of Regulatory Affairs
Washington, District of Columbia, United States · Posted on Dec 23, 2025

Summer 2026 Internship - Materials Engineer
El Segundo, California, United States · Posted on Dec 23, 2025

Facilities Director
El Segundo, California, United States · Posted on Dec 20, 2025

Technical Recruiter (Intermediate to Senior)
El Segundo, California, United States · Posted on Dec 18, 2025

Senior Tooling Engineer
El Segundo, California, United States · Posted on Dec 18, 2025

Senior Automation and Controls Engineer
El Segundo, California, United States · Posted on Dec 18, 2025

Senior Manufacturing Engineer
El Segundo, California, United States · Posted on Dec 17, 2025

Lead Materials Engineer
El Segundo, California, United States · Posted on Dec 17, 2025

Senior System Administrator
El Segundo, California, United States · Posted on Dec 15, 2025

Senior Structural Engineer
El Segundo, California, United States · Posted on Dec 11, 2025

Senior Mechanical Engineer (Structures)
El Segundo, California, United States · Posted on Dec 11, 2025

Senior Mechanical Engineer (Sheet Metal Structures)
El Segundo, California, United States · Posted on Dec 11, 2025
Explore similar companies to Radiant
Last Energy
Transforming nuclear power development.
Arbor Energy
Carbon-negative power.
Antares
Nuclear microreactors.
The Nuclear Company
America’s deployment platform for nuclear power.
Airloom
The next era of wind power.
Valar Atomics
The new atomic age.
Daylight
The decentralized energy company.
Aalo Atomics
Mass-manufactured nuclear plants.
General Matter
Enriching uranium in America.















