Radiant · 18 hours ago
Regulatory Systems Engineer
El Segundo, California, United States
Full-time
Onsite
Senior Level
5+ years expRadiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The Regulatory Systems Engineer will support regulatory compliance and safety analysis for reactor demonstrations, ensuring that engineering design meets nuclear regulatory requirements.
Clean EnergyEnergyEnergy EfficiencyRenewable Energy
No H1B
Responsibilities
Translate engineering design and product integration efforts into accurate and comprehensive regulatory documentation that meets the standards of nuclear regulatory bodies, ensuring clarity and compliance
Develop and conduct critical analyses, including:
Dose-Consequence Analysis to evaluate radiological impacts
Probabilistic Risk Assessment (PRA) to quantify system risks
Hazards and Operability Studies (HazOp) to identify operational hazards
Process Hazard Analysis (PHA) to assess process-related risks
Failure Modes and Effects Analysis (FMEA) to evaluate potential system failures and their impacts
Manage and respond to Requests for Information (RFIs) from regulatory bodies and stakeholders, ensuring timely, accurate, and professional communication
Develop and implement strategies to manage technical and regulatory risks, ensuring alignment with project objectives and safety requirements
Ensure all documentation associated with Radiant reactor demonstrations is comprehensive, self-consistent, and maintained throughout the system lifecycle, adhering to regulatory and industry standards
Qualification
Required
Bachelor's or advanced degree in nuclear engineering or a closely related field (e.g., mechanical engineering, chemical engineering, or physics with a nuclear focus)
5+ years of relevant experience
Demonstrated experience with multi-physics simulations and transient analysis of reactor systems, including familiarity with tools such as MCNP, RELAP5, or similar software
Experience in nuclear regulatory compliance, safety analysis, or risk assessment (e.g., PRA, HazOp, PHA, or FMEA)
Proficiency in performing complex safety and risk analyses, with a focus on nuclear reactor systems
Preferred
Strong technical writing skills, with the ability to produce clear, concise, and regulatory-compliant documentation
Demonstrated experience interacting with regulators, stakeholders, and cross-functional teams
Benefits
Stock: Substantial incentive stock plan for all full-time employees.
Medical: 100% premium coverage for base Silver level plan for employee + 50% premium coverage for dependents. Platinum plans available.
One Medical: Sponsored memberships for eligible employees and their dependents.
Vision: 100% premium coverage for top tier plan + 50% for dependents.
Dental: 100% premium coverage for top tier plan (including orthodontia) + 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.
Daily catered lunch. Free snacks and drinks.
Flexible PTO policy. Remote workday allocation.
Company and team-bonding events, happy hours and in-person camaraderie.
Beautiful El Segundo headquarters close to the Pacific Ocean.
Company
Radiant
Radiant develops portable nuclear microreactors designed to generate electricity and heat in a compact, factory-built form.
51-200 employees
Funding
Current Stage
Late StageTotal Funding
$518.82MKey Investors
Andreessen HorowitzUnion Square Ventures
2025-12-17Series D· $300M
2024-11-14Series C· $165M
2023-04-18Series B· $40M
Leadership Team
Doug Bernauer
Chief Executive Officer
Recent News
alleywatch.com
2026-01-23
2026-01-07
The Motley Fool
2026-01-04
Company data provided by crunchbase