Recruiting Coordinator (Contract)

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, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. 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 leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. 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.

Recruiting Coordinator Please note: This is a 3-6-month contract-to-hire position. Conversion to FTE will depend on company need, performance, and business priorities. Radiant is seeking a detail-oriented, organized, and mission-driven Recruiting Coordinator to support our fast-growing team in a high-velocity startup environment. You will be the backbone of the recruiting function—owning the candidate experience while also strengthening recruiting operations and processes that enable us to scale effectively.The ideal candidate thrives on organization, communication, and problem-solving. You’ll partner closely with recruiters, sourcers, and hiring managers to manage interview scheduling, candidate communication, and recruiting systems. In addition, you’ll contribute to process improvements, data integrity, and reporting that enhance how we hire. This role offers the opportunity to help shape the candidate journey and the operational foundation that supports building the world’s first portable zero-carbon nuclear microreactor. Responsibilities and Duties

Coordinate and schedule interviews across multiple time zones, ensuring a smooth and efficient process.

Manage candidate communication and serve as the first point of contact, providing a professional, timely, and thoughtful experience that reflects Radiant’s mission and culture.

Maintain and improve accuracy in our applicant tracking system (ATS), ensuring data integrity, pipeline visibility, and consistent candidate records.

Partner with recruiters and hiring managers to optimize recruiting workflows, identify bottlenecks, and propose solutions.