Climate · El Segundo, California

Radiant

Radiant develops mass-produced portable nuclear microreactors, with its flagship Kaleidos product delivering 1 MW of failsafe power for diverse locations, targeting customer deployments by 2028.

Backed by Draper Associates, ARK Venture Fund, Boost VC and 11 more

Work at Radiant?

Locations
El Segundo+3
Also United States, Los Angeles, Oak Ridge
Team size
201-500
Founded 2020
Total raised
$694.8M
Series D · last round Dec '25
Salary range
$74–314k
+ equity · 88 of 89 roles
Open roles
89

Open positions · 89

Filter roles by location
El SegundoOn-site
$115k–$168k/yr
Open

About Radiant

Radiant is a nuclear technology company founded in 2020 that is developing mass-produced portable nuclear microreactors to deliver power where it is needed. The company's flagship product, Kaleidos, is a 1 MW failsafe microreactor designed for transportability and deployment in diverse locations. Radiant plans to conduct testing of its first reactor in 2026, with initial customer deployments expected to begin in 2028.

Funding

$694.8Mtotal raised

Sep '20Mar '22Apr '23Nov '24Dec '25
  • Dec 2025 · Series DDraper Associates, Boost VC, Founders Fund, Friends & Family Capital, Chevron Technology Ventures, ARK Venture Fund
    $300M
  • May 2025 · Series C
    $165M
  • Feb 2025 · Series C
    $66M
  • Nov 2024 · Series C
    $100M
  • Draper Associates
  • ARK Venture Fund
  • Boost VC
  • Chevron Technology Ventures
  • Founders Fund
  • Friends & Family Capital
  • Also Capital
  • Andreessen Horowitz
  • +6 more

Company at a glance

Founded2020
Locations
Los Angeles, United States ·El Segundo, United States

The team at Radiant

201-500 peopleSee everyone on LinkedIn

Doug Bernauer

Chief Executive Officer at Radiant

Mike Starrett

Chief Commercial Officer, North America

Rita Baranwal

SVP of AP300 SMR and Former CTO at Westinghouse. Former Assistant Secretary for Nuclear Energy at US DOE

Tori S

Chief Operating Officer at Radiant

Agnes Gomes-koizumi

Award-Winning Strategic Communications Executive | Scaling Comms for Public & Private Companies | TikTok | Tinder | Helium Mobile | Canoo

Team breakdown

Team Distribution

  • Engineering76%
  • Specialized14%
  • Sales & Business Development5%
  • Operations5%

Where the Team Studied

  1. 1.University of California, Los Angeles
  2. 2.Northeastern University
  3. 3.Caltech
  4. 4.Purdue University
  5. 5.Georgia Institute of Technology

Team Worked At

  • SpaceX
  • Northrop Grumman
  • NuScale Power
  • Aerojet Rocketdyne
  • Ultra Safe Nuclear

Location

Team Composition

237 people
  • Engineering and Technical9 senior136
  • Operations3 senior30
  • Human Resources2 senior16
  • General Management4 senior8
  • Sales3 senior7
  • Finance & Accounting2 senior6
  • Legal2 senior4
  • Marketing2 senior4

Life at Radiant

Frequently asked questions

Of 89 open roles, Radiant has 89 on-site positions.

Radiant is based in Los Angeles, El Segundo.

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