Technical Program 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, 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.

About the Role

As a Technical Program Manager in Radiant’s Commercial organization, your job is to deliver reactors to our contracted customers. You will own the end-to-end process, serving as the single point of accountability from contract award through reactor delivery. You will work with the customer’s site team, ensure compliance with contract requirements, and manage the project from local permitting through electrical interconnection. Within Radiant, your key points of contact will be the licensing, state engagement, engineering, and manufacturing teams. The projects you manage will be successful if they are delivered on time and on budget.
Responsibilities & Duties:

• Ensure the successful delivery of projects under contract for deployment at government and commercial customer sites.

• Manage the timely execution of regulatory, engineering, and siting deliverables.

• Drive contract milestones to completion.

• Own deliverable creation and partner across the team where support is necessary.

• When working with our government customers, act as the primary interface with contracting officers, program offices, installation personnel, and end users.

• When working with our commercial customers, act as the primary interface with project sponsors, site leads, and operations personnel.

• Architect and maintain integrated master schedules and cost baselines, ensuring internal teams and subcontractors are aligned to contract obligations.

• Manage contract compliance including reporting requirements and milestone billing; support negotiation of contract modifications and change orders.

• Independently identify, assess, and drive resolution of programmatic risks and cross-functional dependencies.

• Stand up and refine the project management processes, tools, and reporting cadence needed to provide clear visibility to company leadership and consistent milestone updates to customer partners.

Required Qualifications & Skills:

• 3-5+ years of experience in energy project development, project management, or a related field.

• Experience managing programs requiring the delivery of complex capital equipment or large scale industrial systems.

• Strong command of integrated master scheduling.

• Proven ability to manage programs with significant technical complexity, multiple parallel work streams, and cross-functional dependencies.

• Demonstrated experience managing and reporting project financial performance, budgets, scopes, and schedules.

• U.S. citizenship required (absolutely no exceptions); ability to obtain and maintain a security clearance.

• Ability to travel ~10-20%.

Desired Qualifications & Skills:

• Familiarity with electric power infrastructure projects and knowledge of business issues associated with power delivery services.

• Experience supporting U.S. government contracts.

• Direct working knowledge of FAR/DFARS compliance, government contract types (cost-plus, firm-fixed-price, time and materials), and federal reporting and audit requirements.

• Active DoD security clearance.

Additional Requirements:

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

• Must work 100% onsite at El Segundo HQ.

• Stock: Substantial incentive stock plan for all full-time employees.

• Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.

• One Medical: Sponsored memberships for employees and their dependents.

• Vision: 100% top tier plan coverage + 50% for dependents.

• Dental: 100% top tier plan coverage, orthodontia extra, 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.

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: [email protected].
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.