@RadiantNuclear - Radiant

Los Angeles, CA
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101 job openings
Making Nuclear Power Portable website
Making Nuclear Power Portable x.com/radiantnuclear

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capitalalso
Also Capital
New York, NY
dougbernauer
Doug Bernauer
El Segundo, CA
torishiv
Tori Shivanandan

About

a16z AD 50 2026: Production is Deterrence

El Segundo, CA · Founded 2020 · Inputs

Doug Bernauer began exploring nuclear power at SpaceX while working out how to supply energy to a Mars colony. He co-founded Radiant , which is developing Kaleidos, a transportable reactor, built in a factory, and designed to supply one megawatt of electricity. The reactors are designed with military installations and remote customers in mind, offering an alternative to diesel generators that need regular fuel deliveries. The company sent their first demonstration unit to Idaho National Laboratory in August 2026 and plans an Oak Ridge factory designed for up to 50 units a year. An Army Janus agreement worth up to $750 million covers the development and deployment of 15 units.

Source:  a16z.news

Designer and manufacturer of 1.2 Megawatt scale nuclear fission modular microreactors for austere environments and off-grid backup use-cases.

El Segundo, CA; Founded 2019; Stage: Series C

Radiant completed the front-end engineering and experiment design (FEEED) phase of their Kaleidos nuclear reactor in collaboration with Idaho National Lab, a critical milestone on the way to completing their first reactor in 2026. Building off of their technical success, Radiant closed a $100M Series C financing round led by DCVC.

Source:  addtheegg.com

101 jobs
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Department
Job Title
Location Workplace Salary Posted 📅
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Job Title Location Workplace Salary Posted
Engineering
 Director, Nuclear EngineeringEl Segundo, CAonsite$173,000-237,3002026-08-29
 Engineering Manager, Hardware-in-the-Loop (HIL)El Segundo, CAonsite$208,500-284,0252026-09-28
 Harness Design EngineerEl Segundo, CAonsite$124,500-172,7252026-11-10
 Lead Nuclear EngineerEl Segundo, CAonsite$161,288-223,6502026-09-11
 Lead Nuclear Materials EngineerEl Segundo, CAonsite$140,500-202,4752026-10-12
 Lead Reactor Operations EngineerEl Segundo, CAonsite$161,288-223,6502026-09-16
 Lead Test Engineer, Power GenerationEl Segundo, CAonsite$150,500-207,9002026-02-10
 Lead, Fluid Systems EngineeringEl Segundo, CAonsite$150,500-207,9002026-11-11
 Lead, Test EngineeringEl Segundo, CAonsite$140,500-202,4752026-11-11
 Loads & Dynamics EngineerEl Segundo, CAonsite$182,000-292,9502026-08-07
 Manager of Quality ControlEl Segundo, CAonsite$123,000-173,2502026-10-28
 Manager, Regulatory Systems EngineeringEl Segundo, CAonsite$186,000-258,3002026-05-06
 Materials Engineer, Moderator MaterialsEl Segundo, CAonsite$106,500-146,4752026-10-20
 Mechanical Engineer, Electrical IntegrationEl Segundo, CAonsite$124,500-172,7252026-11-10
 Mechanical Engineer, Fluid SystemsEl Segundo, CAonsite$107,500-150,0002026-05-27
 Mechanisms EngineerEl Segundo, CAonsite$133,500-184,8002026-10-12
 Nuclear EngineerEl Segundo, CAonsite$106,500-146,4752026-08-07
 Nuclear Engineer, Core PhysicsEl Segundo, CAonsite$106,500-146,4752026-08-07
 Nuclear Engineer, SensorsEl Segundo, CAonsite$106,500-146,4752026-08-07
 Principal Electrical Engineer, ElectronicsEl Segundo, CAonsite$200,500-314,4752026-10-22
 Principal Electrical Engineer, HIL (hardware-in-the-loop)El Segundo, CAonsite$200,500-314,4752026-06-16
 Principal Embedded Software EngineerEl Segundo, CAonsite$200,500-314,4752026-05-29
 Principal Mechanical Design Engineer, TurbomachineryEl Segundo, CAonsite$200,500-314,4752026-11-11
 Principal Nuclear EngineerEl Segundo, CAonsite$195,713-262,5002026-09-11
 Principal Power Systems EngineerEl Segundo, CAonsite$200,500-314,4752026-02-19
 Principal Thermal Modeling AnalystEl Segundo, CAonsite$182,000-292,9502026-11-11
 Principal Thermal Modeling EngineerEl Segundo, CAonsite$182,000-292,9502026-11-05
 Principal Thermal-Hydraulics EngineerEl Segundo, CAonsite$182,000-292,9502026-11-11
 Principal Turbomachinery EngineerEl Segundo, CAonsite$200,500-314,4752026-11-05
 Quality Operations SpecialistEl Segundo, CAonsite$100,500-142,8002026-09-08
 Regulatory Program ManagerEl Segundo, CAonsite$186,000-258,3002026-07-16
 Senior Automation and Controls EngineerEl Segundo, CAonsite$158,000-219,4502026-08-14
 Senior Build Engineer, TurbomachineryEl Segundo, CAonsite$158,000-219,4502026-11-12
 Senior Civil Engineer, Concrete StructuresEl Segundo, CAonsite$133,500-184,8002026-10-28
 Senior Electrical Engineer, ControlsEl Segundo, CAonsite$158,000-219,4502026-02-06
 Senior Electrical Engineer, HIL (hardware-in-the-loop)El Segundo, CAonsite$158,000-219,4502026-10-22
 Senior Electrical Engineer, PCBEl Segundo, CAonsite$158,000-219,4502026-08-10
 Senior Equipment EngineerEl Segundo, CAonsite$133,500-184,8002026-06-25
 Senior Fluid Systems EngineerEl Segundo, CAonsite$158,000-219,4502026-10-12
 Senior Manager, Embedded Systems EngineeringEl Segundo, CAonsite$208,500-284,0252026-06-25
 Senior Manager, Power SystemsEl Segundo, CAonsite$208,500-284,0252026-07-02
 Senior Manufacturing EngineerEl Segundo, CAonsite$133,500-184,8002025-10-02
 Senior Manufacturing Engineer, DFMEl Segundo, CAonsite$133,500-184,8002026-10-03
 Senior Mechanical Engineer – Turbomachinery RotordynamicsEl Segundo, CAonsite$158,000-219,4502025-10-13
 Senior Mechanical Engineer, Fluid SystemsEl Segundo, CAonsite$158,000-219,4502026-05-20
 Senior Mechanical Engineer, MechanismsEl Segundo, CAonsite$133,500-184,8002026-06-16
 Senior Mechanical Engineer, StructuresEl Segundo, CAonsite$133,500-184,8002026-10-28
 Senior Mechanisms EngineerEl Segundo, CAonsite$133,500-184,8002026-06-10
 Senior Nuclear EngineerEl Segundo, CAonsite$150,025-211,8382026-08-07
 Senior Power Electronics EngineerEl Segundo, CAonsite$158,000-219,4502026-03-17
 Senior Reactor EngineerEl Segundo, CAonsite$150,025-211,8382026-10-15
 Senior Regulatory EngineerEl Segundo, CAonsite$133,500-190,0502026-11-04
 Senior Safety Analysis EngineerEl Segundo, CAonsite$150,025-211,8382026-10-15
 Senior Simulation EngineerEl Segundo, CAonsite$158,000-219,4502026-09-04
 Senior Software Engineer, FrontendEl Segundo, CAonsite$158,000-219,4502026-10-02
 Senior Stress EngineerEl Segundo, CAonsite$133,500-184,8002026-08-11
 Senior Structural Engineer, ConcreteEl Segundo, CAonsite$133,500-184,8002026-10-28
 Senior Structures EngineerEl Segundo, CAonsite$133,500-184,8002026-10-28
 Senior System AdministratorEl Segundo, CAonsite$133,500-190,0502026-09-12
 Senior Technical Program Manager, IT InfrastructureEl Segundo, CAonsite$133,500-190,0502026-09-04
 Senior Test Engineer, Mechanical/FluidsEl Segundo, CAonsite$133,500-184,8002026-11-11
 Senior Tooling EngineerEl Segundo, CAonsite$133,500-184,8002026-09-02
 Staff Fluid Systems EngineerEl Segundo, CAonsite$158,000-219,4502026-10-12
 Staff Loads & Dynamics EngineerEl Segundo, CAonsite$162,500-228,8002026-08-07
 Staff Manufacturing Engineer, DFMEl Segundo, CAonsite$160,000-210,0002026-10-03
 Staff Mechanical Design Engineer, TurbomachineryEl Segundo, CAonsite$200,500-314,4752026-11-11
 Staff Mechanical Engineer, Fluid SystemsEl Segundo, CAonsite$200,500-314,4752026-05-20
 Staff Nuclear EngineerEl Segundo, CAonsite$195,713-262,5002026-11-07
 Staff Regulatory EngineerEl Segundo, CAonsite$177,500-218,9262026-11-04
 Staff Structures EngineerEl Segundo, CAonsite$168,500-207,9002026-10-28
 Staff Turbomachinery EngineerEl Segundo, CAonsite$200,500-314,4752026-11-02
 Supplier Quality / Development EngineerEl Segundo, CAonsite$100,500-142,8002026-10-28
 Supply Reliability EngineerEl Segundo, CAonsite$100,500-142,8002026-10-30
 Systems EngineerEl Segundo, CAonsite$133,500-190,0502026-05-04
 Test Engineer, Mechanical/FluidsEl Segundo, CAonsite$106,500-146,4752026-11-11
Operations
 Accounts Payable ManagerEl Segundo, CAonsite$85,500-122,3252026-10-27
 Associate BuyerEl Segundo, CAonsite$85,500-122,3252026-10-29
 Buyer, Direct CommoditiesEl Segundo, CAonsite$115,000-168,0002026-10-29
 Construction ManagerEl Segundo, CA; Oak Ridge, TNonsite$115,000-190,5752026-09-23
 Direct Procurement ManagerEl Segundo, CAonsite$115,000-168,0002026-09-09
 Director of Policy and Government AffairsWashington, DConsite$160,500-236,2502026-10-20
 Environmental, Health & Safety (EHS) ManagerEl Segundo, CAonsite$123,000-173,2502026-11-12
 ERP Solutions Engineer, FinanceEl Segundo, CAonsite$115,000-168,0002026-10-15
 Executive Assistant & Office CoordinatorWashington, DConsite$35-592026-10-09
 Indirect Procurement AssociateEl Segundo, CAonsite$85,500-122,5002026-10-06
 Indirect Procurement ManagerEl Segundo, CAonsite$85,500-168,0002026-10-02
 Investor Relations DirectorEl Segundo, CAonsite$154,500-256,2002026-06-17
 Media Relations DirectorEl Segundo, CAonsite$154,500-256,2002026-06-12
 Permitting ManagerWashington, DConsite$115,000-168,0002026-09-02
 Program Development LeadEl Segundo, CAonsite$154,500-190,5752026-11-06
 Risk & Compliance LeadEl Segundo, CAonsite$115,000-168,0002026-07-24
 Senior Accounting ManagerEl Segundo, CAonsite$115,000-168,0002026-10-16
 Senior Manager Government AffairsWashington, DConsite$160,500-236,2502026-10-20
 Senior Material PlannerEl Segundo, CAonsite$115,000-168,0002026-10-05
 Senior Operations AssociateEl Segundo, CAonsite$115,000-168,0002026-11-05
 Senior Technical RecruiterEl Segundo, CAonsite$115,000-168,0002026-06-08
 Site LeadEl Segundo, CAonsite$115,000-168,0002026-11-04
 Strategic Sourcing ManagerEl Segundo, CAonsite$85,500-168,0002026-10-06
 Structured Finance ManagerEl Segundo, CAonsite$154,500-256,2002026-07-24
 T&E Accounting Specialist (Contract)El Segundo, CAonsite$41-592026-10-12
 Technical Program ManagerEl Segundo, CAonsite$133,500-218,9252026-09-16
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