Radiant Industries

Senior Reactor Systems Engineer

El Segundo, CA · Senior · Contract

Sponsorship not specifiedDetected 41 days ago

PythonLinuxComplianceHRISSystems EngineeringProblem Solving

About the role

This role offers a rare opportunity to bridge engineering, operations, and human factors in a highly technical and fast-paced environment.
Your work will ensure that Reactor Operators (ROs) and Senior Reactor Operators (SROs) can efficiently and safely execute test, commissioning, and operational activities.
Qualify as an operator to gain firsthand experience, ensuring procedures align with real-world execution.

Collaborate closely with engineers to improve operator interfaces, procedural workflows, and software tools.
Support testing and iterative improvements of digital twin scenarios, operator systems, and human-machine interfaces.
Develop and refine operational procedures that integrate both software and hardware-in-the-loop testing.
Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors.
Radiant's unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.
You will collaborate with a multidisciplinary team to translate complex hardware and software designs into clear, executable, and DOE or NRC compliant procedures.
6-7+ years of full-time professional experience in engineering problem-solving, including system design, analysis, or testing.

Prior experience working as an operator in nuclear environments (e.g., nuclear energy, naval reactors, or radiation-controlled facilities), with familiarity in safety protocols, regulatory compliance, and high-reliability operations
Hands-on experience in developing technical procedures, human factors engineering, or operational interface design.

Proficiency in managing or optimizing complex hardware and software processes for testing and operations.
Ability to apply first principles thinking to solve problems and make decisions in uncertain or ambiguous situations.
Background in highly regulated industries (e.g., nuclear, aerospace, aviation, maritime).
Desired Qualifications &
2+ years of full-time nuclear operations experience.
Licensed as Senior Reactor Operator or Naval equivalent.
Prior operations background such as mission control room operator.
Proficiency in Python, UNIX, for procedure testing within the simulator environments.
Experience with human factors and user-centered instructions for operational workflows.
Desired Qualifications & Skills:

100% top tier plan coverage + 50% for dependents.
Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
8-weeks of paid parental leave for all parents.
Additional paid pregnancy leave for CA employees.
Flexible PTO policy.

recruiting@radiantnuclear.com.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
This position involves access to technology that is subject to U.S. export controls.
Any job offer made will be contingent upon the applicant's capacity to serve in compliance with U.S. export controls.
Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.
We are seeking a Senior Reactor Systems Engineer to design and implement mission-critical procedures for reactor operators managing our groundbreaking nuclear microreactor technology.

This listing is sourced directly from Radiant Industries's careers page and normalized into a canonical job model.