About Radiant

Radiant is an El Segundo, CA-based company building the world's only mass-produced, transportable nuclear microreactors. The U.S. grid is under growing strain, with power demand accelerating, driving higher utility costs, rising carbon emissions, and interconnection backlogs. Radiant has a solution, transportable, on-site power. Our first reactor, Kaleidos, is 1 megawatt: small enough to be factory-built, transported by land, sea, or air, and deployed wherever power is needed. 1 MW can power 1000 homes for five years. Ship it back and we refuel for a 20 year operating life. We made energy a product that can be used for critical infrastructure like military bases, data centers, hospitals, and remote sites, as well as the commercial main street businesses that keep America running. Founded in 2020, Radiant is under contract to deliver power to the U.S. Army, Navy and Air Force and has signed pre-order agreements with Equinix, with deployments beginning in 2028.

About the Role

Radiant is seeking a Senior Manager Government Affairs, to lead the company’s engagement with Congress and help shape the policy, authorization, and appropriations environment required to deploy microreactors across U.S. government customers.

This role sits at the center of Radiant’s federal growth strategy. Because many of Radiant’s deployments will support national security, energy resilience, and mission assurance objectives across the government (e.g., military, FEMA, and more), this individual will help drive legislative strategies that enable customers to fund, procure, authorize, and scale the deployment of advanced nuclear systems.

This is not a traditional policy role. The right candidate will understand how Congress actually works, navigate the authorization and appropriations processes, and translate technical and operational priorities into legislative outcomes. You will work directly with company leadership and cross-functional teams to drive funding and policy support for real deployments.

Responsibilities & Duties

Congressional Strategy & Appropriations:

Develop and execute Radiant’s congressional affairs strategy in support of key U.S. government programs, customer priorities, and deployment timelines.

Build and maintain strong relationships with Members of Congress, committee staff, leadership offices, and personal offices, particularly across defense, energy, appropriations, and homeland security portfolios.

Identify opportunities to advance authorizing and appropriations language that supports the deployment of advanced nuclear systems for mission-critical government applications.

Track, analyze, and influence annual authorization and appropriations cycles, hearings, markups, and legislative proposals relevant to Radiant’s customers and priority programs.

Prepare briefing materials, hearing memos, legislative analyses, and strategic recommendations for company leadership.

Help shape the external narrative around Radiant’s role in supporting national security, resilient infrastructure, and operational energy objectives.

Cross-Functional Execution:

Partner closely with business development, policy, regulatory, and technical teams to align congressional strategy with customer needs, capture priorities, and deployment opportunities.

Translate Radiant’s technical capabilities into clear policy, budgetary, and legislative objectives.

Support the development of congressional engagement plans tied to specific programs, accounts, and federal customers.

Provide leadership with clear, actionable insight on legislative dynamics, stakeholder positioning, and emerging opportunities or risks

External Affairs & Stakeholder Management:

Coordinate with outside consultants, trade associations, think tanks, and aligned partners in support of Radiant’s policy and legislative priorities.

Support senior executives in congressional meetings, strategic external engagements, and high-priority policy events.

Build relationships across the broader defense, energy, and industrial base ecosystem to strengthen support for advanced nuclear deployment.