Director of Regulatory Affairs

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.

Radiant is seeking a highly engaging and effective leader for our regulatory and licensing team. The Director of Regulatory Affairs will oversee licensing engagement, strategy, process, and execution with the U.S. Nuclear Regulatory Commission (NRC). You will play a pivotal role in driving Kaleidos’ development timeline, successful demonstration, and future commercialization. The ideal candidate is experienced working with government agencies and officials in risk‑informed regulations, is determined to execute on how things should be done vs.

how they’ve always been done and can engage deeply with our engineering organization to produce a foundationally safe product rather than one that simply checks regulatory boxes. The ideal candidate will foster a healthy team culture, provide support and clarity where needed, and come in with a player‑coach mindset. We are looking for someone who is excited to put the first microreactor on the market and provide clean, reliable energy to remote areas around the world.

This role reports to our Chief Nuclear Officer and is based in Washington, DC.

• Provide licensing and regulatory leadership and strategic guidance to a high performing team.
• Craft a modern regulatory strategy based in sound engineering principles with input from executives, our board of directors, and industry experts that brings the safest product to market the fastest.
• Own end‑to‑end licensing execution efforts establishing strict principle‑based standards while promoting streamlined, modern approaches to regulatory interactions.
• Facilitate collaborative and cohesive partnerships with internal stakeholders and external regulatory and governing bodies to drive desirable results. Includes attending in‑person NRC visits, online meetings, and industry‑related social events.
• Ensure the completeness, timeliness, and quality of licensing and regulatory submissions.
• Integrate our regulatory process with technical teams to meet quality assurance and regulatory standards.

• Bachelor’s degree at an accredited institution in engineering discipline.
• 8+ years of industry experience working on nuclear regulatory and licensing efforts.
• 2+ years leading a team.
• Ability to travel and attend in‑person meetings.

• Direct experience with the NRC.
• Experience in 10 CFR 50 and 10 CFR 70.
• Demonstrated ability to work with a technical team to take complex information and simplify it for non‑technical audiences.
• Intrinsic motivation to forge through decades of regulatory precedence with a creative approach.
• Strategic aptitude to bring together various complicated threads into a simple through line.
• Outstanding written and verbal communications skills, as well as building relationships with internal and external stakeholders.
• Demonstrated ability to create coalitions and partnerships with other leaders in nuclear industry.

• Must be willing to work extended hours and weekends as necessary to accomplish our mission.

Radiant's new hire compensation package includes base salary, substantial equity grants, and comprehensive benefits. Total compensation and level are determined through a holistic evaluation of your interview…