Environmental, Health & Safety (EHS) Manager

Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt failsafe microreactor that can be transported anywhere power is needed and run for up to five years without the need to refuel. Portable nuclear power with rapid deploy capability can replace similar-sized diesel generators, and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development utilizes modern software engineering to rapidly achieve safe, factory-built microreactors that leverage existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor next year at the Idaho National Laboratory, with initial customer deliveries beginning in 2028.

Environmental, Health & Safety (EHS) Manager

We are seeking an Environmental, Health & Safety (EHS) Manager to serve as the site-level EHS authority supporting manufacturing and operations in a lean, fast-moving environment. This role owns the development, implementation, and execution of EHS programs that protect employees, ensure regulatory compliance, and scale with the business. The EHS Manager maintains a strong shop-floor presence and partners closely with Manufacturing, Operations, and Facilities to identify hazards, reduce risk, and embed safety and environmental compliance into daily operations. This role balances hands-on field engagement with program ownership, regulatory interface, and continuous improvement leadership. 

Responsibilities and Duties:

Safety leadership and OSHA compliance:

• Serve as the site authority for OSHA / Cal-OSHA compliance, including inspections, regulatory correspondence, recordkeeping, and corrective action management.
• Develop, implement, and maintain required safety programs(e.g., IIPP, Hazard Communication, Lockout/Tagout, Electrical Safety, Hot Work, Contractor Safety) to support a growing manufacturing operation. 
• Develop and lead all safety training.
• Define and maintain PPE requirements, conduct hazard assessments, and ensure proper selection, training, and usage.
• Own emergency preparedness programs, including Emergency Action Plans, evacuation procedures, drills, and emergency response coordination.
• Partner with Facilities on fire suppression, alarm, and detection systems.
• Conduct routine shop-floor safety observations
• Track leading and key EHS metrics and drive proactive risk reduction.
• Lead incident reporting, investigations, and root cause analysis for injuries, fires, spills, near-misses, and emergency events.

Manufacturing & operations risk mitigation:

• Partner closely with manufacturing and operations teams to identify hazards and implement engineering and administrative controls.
• Evaluate EHS risk for new processes, equipment, tooling, and work centers prior to installation or commissioning to influence design decisions and ensure safety requirements are met.
• Maintain a regular shop-floor presence to identify hazards, observe operations and drive continuous improvement initiatives.

Hazardous materials & waste management:

• Own hazardous materials management, including inventory, SDS, labeling, storage compatibility, locations and quantities.
• Ensure compliant handling and storage of hazardous materials, including flammable and combustible materials.
• Manage hazardous waste accumulation areas, manifests, inspections, and disposal vendor coordination.

Environmental compliance & permitting:

• Manage and maintain environmental permits and programs, including hazardous materials, hazardous waste, air emissions, wastewater, and stormwater.
• Ensure permit conditions and regulatory requirements are implemented, documented, and routinely verified.
• Lead environmental inspections and regulatory interactions with local, state, and federal agencies as required.
• Track leading and key EHS metrics and drive proactive risk reduction.
• Partner with Facilities on facility modifications, construction, and equipment installations to ensure safety and environmental requirements are addressed.

Required Skills and Qualifications:

• Bachelor’s degree in environmental engineering, safety engineering, industrial engineering, environmental science, or a related field.
• 5+ years of EHS experience in manufacturing, industrial, or regulated environments.
• Strong working knowledge of OSHA / Cal-OSHA, fire safety, hazardous materials management, and environmental compliance requirements.
• Experience developing and delivering engaging safety training
• Comfortable acting as the primary EHS owner in a lean organization.
• Hands-on, practical, and effective at partnering directly with manufacturing teams.
• Experience working with high-pressure and high-temperature machinery, especially custom-built equipment, is a plus.

Desired Skills and Qualifications:

• Safety is embedded into daily operations, decision-making, and standard work—not treated as a separate function.
• Employees understand hazards, feel comfortable raising concerns, and know how to respond confidently to emergency events.
• Safety trainings are current, relevant, practical, and well delivered.
• Fire protection systems, emergency equipment, and controls are well maintained, understood, and trusted by employees.
• Manufacturing, engineering, and operations teams proactively engage EHS early to solve problems and design safer solutions.
• Risks and trends are identified early, and corrective actions are implemented before incidents occur.
• The EHS Manager is a trusted, visible presence on the shop floor – approachable, solutions-oriented, and respected for balancing operational needs with employee safety.

Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.

The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.

Benefits and Perks for Eligible Employees:

• 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.
• Burgeoning satellite offices in Oak Ridge, TN and Washington, D.C., near Capitol Hill.

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.

Unfortunately, we are unable to provide visa sponsorship at this time.

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.