Nuclear Core Physics Engineer — Onsite (El Segundo) + Equity
Radiant
Radiant in El Segundo, CA is seeking a Nuclear Engineer, Core Physics to design and execute the 2026 demonstration reactor testing program. You will develop procedures, conduct neutronic and transient analyses, and collaborate with fellow nuclear and systems engineers to meet safety and test objectives. The role requires hands-on reactor operations experience, strong knowledge of radiation transport, and the ability to document procedures and train operators for the control room interface. #J-18808-Ljbffr Radiant
$106.5k - $146.48k
...RadiantRadiant is an El Segundo, CA-based startup... ..., portable nuclear microreactors. The... ...modern software engineering to rapidly deliver... ...Nuclear Engineer, Core Physics responsible for designing... ....Must work 100% onsite at El Segundo HQ.... ..., substantial equity grants, and...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$133.5k - $207.9k
Pow.bio is seeking a Senior Structures Engineer at their El Segundo HQ to design critical structures, ensuring reliability and efficiency. The role... ...of $133.5K to $207.9K is offered, along with substantial equity and comprehensive benefits, including medical, dental, and...Employment EquityNuclearFlexible hours$133.5k - $184.8k
...RadiantRadiant is an El Segundo, CA-based... ...produced, portable nuclear microreactors.... ...software engineering to rapidly deliver... ...methods and reactor physics calculations of... ...methods of core neutronics and... ...Must work 100% onsite at El Segundo HQ... ..., substantial equity grants, and comprehensive...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work- Pow.bio is looking for a Senior Test Engineer in El Segundo, CA, to design mission-critical procedures for nuclear microreactor technology. You will collaborate with a multidisciplinary team and gain hands-on experience as a Reactor Operator, influencing future reactor...Nuclear
- Radiant Industries in El Segundo, CA is looking for a Senior Test Engineer to design crucial procedures for reactor operators of its groundbreaking nuclear microreactor technology. This role requires a mix of engineering, operations, and human factors expertise in a fast...Nuclear
- Radiant in El Segundo, CA is seeking a Senior Structures Engineer to design critical structures for their innovative microreactor, Kaleidos. The role requires expertise in stress analysis, thermomechanical analysis, and material selection for high-temperature environments...Nuclear
- ....bio, a startup based in El Segundo, CA, is looking for a Systems Engineer to develop design standards and governance for nuclear reactors. This role is pivotal... ...requires working fully onsite at the El Segundo HQ, with offers of substantial equity grants and health...Employment EquityNuclear
- A startup in portable nuclear technology in El Segundo seeks a Senior Manufacturing Engineer to innovatively produce complex mechanisms for... ...experience are required. The role is fully onsite and encompasses opportunities for significant equity and comprehensive benefits. #J-188...Employment EquityNuclear
- A cutting-edge energy startup in El Segundo is seeking a Senior Mechanical Engineer to design and test turbomachinery for portable nuclear power systems. This role requires a strong background... .... The position offers substantial equity, comprehensive benefits, and a dynamic...Employment EquityNuclear
- Radiant, headquartered in El Segundo, is seeking an experienced Regulatory... ...authorization efforts for nuclear reactor deployments. You will coordinate with regulators, engineers, and partners to deliver... ...junior staff while working 100% onsite at El Segundo HQ. #J-18808-Ljbffr...Nuclear
$133.5k - $190.05k
...Radiant Radiant is an El Segundo, CA-based startup... ..., portable nuclear microreactors. The... ...leverages modern software engineering to rapidly deliver... ...for reactor core, structures, fluid... ...Must work 100% onsite at El Segundo HQ.... ...salary, substantial equity grants, and comprehensive...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work- Radiant Nuclear is seeking an Export Control Specialist to support international compliance... ...department and collaborates across engineering, operations, supply chain, and... ...experience, and a willingness to work 100% onsite at the El Segundo #J-18808-Ljbffr Cantos VenturesNuclear
$107.5k - $150k
...RadiantRadiant is an El Segundo, CA-based startup... ..., portable nuclear microreactors. The... ...leverages modern software engineering to rapidly deliver... ...from the reactor core into electrical... ...mission.Must work 100% onsite at El Segundo HQ.... ..., substantial equity grants, and comprehensive...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$158k - $219.45k
...RadiantRadiant is an El Segundo, CA-based startup... ..., portable nuclear microreactors. The... ...leverages modern software engineering to rapidly deliver... ...nuclear reactor core, fluid heat... ...mission.Must work 100% onsite at El Segundo HQ.Benefits... ..., substantial equity grants, and...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$158k - $219.45k
...RadiantRadiant is an El Segundo, CA-based startup... ..., portable nuclear microreactors. The... ...leverages modern software engineering to rapidly deliver... ...from the reactor core into electrical... ...mission.Must work 100% onsite at El Segundo HQ.... ..., substantial equity grants, and comprehensive...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$173k - $237.3k
...RadiantRadiant is an El Segundo, CA-based startup... ..., portable nuclear microreactors. The... ...modern software engineering to rapidly deliver... ...engineers spanning core physics, shielding... ...missionMust work 100% onsite at El Segundo HQBenefits... ..., substantial equity grants, and...Employment EquityNuclearFull timeSummer workImmediate startRemote workRelocationFlexible hoursShift workWeekend work$106.5k - $146.48k
...RadiantRadiant is an El Segundo, CA-based... ...produced, portable nuclear microreactors.... ...software engineering to rapidly deliver... ...qualification for reactor physics, shielding, and... ...and qualify in-core and ex-core... ...Must work 100% onsite at El Segundo... ..., substantial equity grants, and...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work- ...Radiant is an El Segundo, CA-based startup... ..., portable nuclear microreactors.... ...modern software engineering to rapidly deliver... ...methods and reactor physics calculations of... ...methods of core neutronics and... ...Must work 100% onsite at El Segundo HQ... ..., substantial equity grants, and comprehensive...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work
- Boeing Defense, Space and Security is seeking an Entry-Level DSP Algorithms Engineer to join the Space, Intelligence and Weapons Systems teams in El Segundo, CA. This is an onsite role with a 9/80 schedule; candidates must be eligible for US security clearance and hold...
$133.5k - $190.05k
...RadiantRadiant is an El Segundo, CA-based startup building... ...-produced, portable nuclear microreactors. The... ...leverages modern software engineering to rapidly deliver... ...requirements for reactor core, structures, fluid systems... ...salary, substantial equity grants, and...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hours- Radiant Industries in El Segundo, CA, is seeking a Senior Technical Recruiter to lead recruitment for a range of roles in a startup environment... ...in sourcing top talent. Join Radiant’s mission to innovate in nuclear energy with a passionate team. #J-18808-Ljbffr Radiant...Nuclear
$133.5k - $184.8k
...RadiantRadiant is an El Segundo, CA-based startup building... ...-produced, portable nuclear microreactors. The... ...leverages modern software engineering to rapidly deliver... ...mission.Must work 100% onsite at El Segundo HQ.Benefits... ...salary, substantial equity grants, and comprehensive...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$133.5k - $190.05k
...RadiantRadiant is an El Segundo, CA-based startup building... ...-produced, portable nuclear microreactors. The... ...leverages modern software engineering to rapidly deliver... ...mission.Must work 100% onsite at El Segundo HQ. Benefits... ...salary, substantial equity grants, and comprehensive...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$133.5k - $184.8k
...Radiant Radiant is an El Segundo, CA-based startup... ...mass-produced, portable nuclear microreactors. The company... ...modern software engineering to rapidly deliver safe... ...mission. Must work 100% onsite at El Segundo HQ.... ...base salary, substantial equity grants, and comprehensive...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$158k - $219.45k
...RadiantRadiant is an El Segundo, CA-based startup building... ...-produced, portable nuclear microreactors. The... ...leverages modern software engineering to rapidly deliver... ...mission. Must work 100% onsite at El Segundo HQ. Benefits... ...salary, substantial equity grants, and...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$133.5k - $184.8k
...RadiantRadiant is an El Segundo, CA-based startup building... ...-produced, portable nuclear microreactors. The... ...leverages modern software engineering to rapidly deliver... ...mission.Must work 100% onsite at El Segundo HQ.Benefits... ...salary, substantial equity grants, and comprehensive...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$158k - $219.45k
...RadiantRadiant is an El Segundo, CA-based startup building... ...-produced, portable nuclear microreactors. The... ...leverages modern software engineering to rapidly deliver... ...mission.Must work 100% onsite at El Segundo HQ.Benefits... ...salary, substantial equity grants, and comprehensive...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$158k - $172.73k
...RadiantRadiant is an El Segundo, CA-based startup building... ...-produced, portable nuclear microreactors. The... ...leverages modern software engineering to rapidly deliver... ...missionMust work 100% onsite at El Segundo HQBenefits... ...base salary, substantial equity grants, and...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$139.5k - $224.7k
...RadiantRadiant is an El Segundo, CA-based startup... ..., portable nuclear microreactors. The... ...leverages modern software engineering to rapidly deliver... ..., and multi-physics interactions.Identify... ...mission.Must work 100% onsite at El Segundo HQ.... ..., substantial equity grants, and comprehensive...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work$100.5k - $142.8k
...RadiantRadiant is an El Segundo, CA-based startup building... ...-produced, portable nuclear microreactors. The... ...leverages modern software engineering to rapidly deliver... ...mission.Must work 100% onsite at El Segundo HQ.Benefits... ...salary, substantial equity grants, and comprehensive...Employment EquityNuclearFull timeSummer workImmediate startRemote workFlexible hoursWeekend work
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