Media Relations Director

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.

We're looking for a Media Relations Director to own Radiant's external media presence—from podcast bookings and journalist relationships to investor amplification and executive communications. This role is critical: despite Radiant having more substance, competitors are seeking to out-hustle us on new media. 

You'll be the primary interface between Radiant and the media world, building relationships with podcasters, journalists, and newsletter writers who cover energy, defense, and technology. You'll prep executives for appearances, coordinate amplification campaigns, and ensure every major milestone gets the coverage it deserves.

What You'll Do

• Drive media coverage for Radiant targeting top-tier outlets, podcasts, shows, and newsletters covering defense, technology, business, government, and energy


• Build and maintain relationships with reporters at those same publications


• Cultivate relationships with new media outlets, newsletters, and online publications that reach our audiences


• Coordinate investor amplification during milestone announcements—pre-briefing investors with draft posts and embargo timing to maximize reach


• Lead executive communications including developing talking points, preparing executives for interviews, and ensuring spokespeople are deployed to appropriate audiences


• Monitor media landscape and competitors, tracking how other nuclear startups are positioning themselves


• Manage crisis communications when Radiant or the nuclear industry faces negative coverage


• Track and report on media metrics, including coverage volume, sentiment, share of voice vs. competitors, and amplification reach

What You Bring

• 8+ years in media relations, communications, or PR—ideally in technology, energy, aerospace, or defense


• Demonstrated success booking executives on broadcast and top-tier podcasts and securing feature coverage from top-tier publications


• Existing relationships with journalists, podcasters, or media gatekeepers (or proven ability to build them)


• Experience preparing spokespeople for high-stakes media appearances


• Understanding of the new media landscape—podcasts, newsletters, social platforms—and how influence flows through and across these channels


• Excellent written and verbal communication skills


• Ability to work across time zones and accommodate media schedules

Bonus Points

• Existing relationships with defense, energy, or technology podcasters and media creators


• Experience with nuclear energy communications and the unique sensitivities involved


• Prior work with defense technology companies

Key Metrics

• 18+ podcast/media appearances per year across executives


• 3+ coordinated investor amplification events per year


• Regular features in high-reach newsletters and publications


• Zero negative stories without Radiant response

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].

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.