<div>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.</div>Internship OverviewRadiant is seeking a motivated National Security Business Development Intern with a strong military background to support our government relations and stakeholder engagement efforts. This role focuses on building relationships with military and government customers to advance Radiant's microreactor technology. Ideal candidates will leverage their military expertise to navigate complex organizational structures and drive engagement initiatives.Responsibilities &amp; Duties<ul><li>Conduct research on military organizational charts, services, Combatant Commands (COCOMs), and related structures to inform strategic outreach.</li><li>Develop comprehensive stakeholder maps for key military and government customers, identifying decision-makers, influencers, and partnership opportunities.</li><li>Craft detailed engagement plans, including preparing presentation materials, meeting agendas, and briefing documents to support Radiant's business objectives.</li><li>Coordinating high-level meetings with government and military stakeholders, including follow-up and relationship management.</li><li>Collaborate with Radiant's leadership team to refine strategies and mitigate risks in government interactions.</li></ul>Required Qualifications<ul><li>Currently enrolled in a top-tier graduate program</li><li>Military experience, with a strong understanding of U.S. Department of Defense (DoD) structures, protocols, and operations.</li><li>U.S. citizenship required due to the nature of government-related work; eligibility for security clearance is a plus.</li><li>Location in or near Washington, DC, for easier access to government offices.</li></ul>Nice-to-Have Qualifications<ul><li>Military Flag or General Officer staff experience.</li><li>Experience in government affairs, defense contracting, or business development within the energy or technology sectors.</li><li>Familiarity with nuclear energy, clean tech, or DoD procurement processes.</li><li>Prior internship or work experience in a startup or high-growth environment.</li></ul>Additional Requirements:  <ul><li>Must be able to commit to 10-12 consecutive weeks in Winter/Spring 2026. </li><li>This internship will require working onsite at our Washington, DC office.</li><li>You may be asked to work extended hours or weekends occasionally to support project goals.</li></ul><div>Total Compensation and BenefitsRadiant'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 performance, experience, education, and qualifications. Benefits and Perks for Eligible Employees:<ul><li>Stock: Substantial incentive stock plan for all full-time employees.</li><li>Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.</li><li>One Medical: Sponsored memberships for employees and their dependents.</li><li>Vision: 100% top tier plan coverage + 50% for dependents.</li><li>Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.</li><li>Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.</li><li>8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.</li><li>Daily catered lunch. Free snacks and drinks.</li><li>Flexible PTO policy. Remote workday allocation.</li><li>Company and team-bonding events, happy hours and in-person camaraderie.</li><li>Beautiful El Segundo headquarters close to the Pacific Ocean.</li></ul>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. </div>

Radiant is a clean energy startup building a nuclear microreactor. A climate-friendly alternative to diesel generators, Radiant's Kaleidos 1MW microreactor will be the world's first portable, zero-emissions power source that works anywhere. We plan to test our development reactor by 2026 and if successful, it will be the first new commercial reactor design to achieve a fueled test in over 50 years. Our microreactor can bring power to remote parts of the world and provide backup power for life-saving applications in hospitals or disaster-relief scenarios.&nbsp;

Spring 2026 Internship - Business Development (Government Relations)

<div>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.</div>Internship OverviewRadiant is seeking a motivated National Security Business Development Intern with a strong military background to support our government relations and stakeholder engagement efforts. This role focuses on building relationships with military and government customers to advance Radiant's microreactor technology. Ideal candidates will leverage their military expertise to navigate complex organizational structures and drive engagement initiatives.Responsibilities &amp; Duties<ul><li>Conduct research on military organizational charts, services, Combatant Commands (COCOMs), and related structures to inform strategic outreach.</li><li>Develop comprehensive stakeholder maps for key military and government customers, identifying decision-makers, influencers, and partnership opportunities.</li><li>Craft detailed engagement plans, including preparing presentation materials, meeting agendas, and briefing documents to support Radiant's business objectives.</li><li>Coordinating high-level meetings with government and military stakeholders, including follow-up and relationship management.</li><li>Collaborate with Radiant's leadership team to refine strategies and mitigate risks in government interactions.</li></ul>Required Qualifications<ul><li>Currently enrolled in a top-tier graduate program</li><li>Military experience, with a strong understanding of U.S. Department of Defense (DoD) structures, protocols, and operations.</li><li>U.S. citizenship required due to the nature of government-related work; eligibility for security clearance is a plus.</li><li>Location in or near Washington, DC, for easier access to government offices.</li></ul>Nice-to-Have Qualifications<ul><li>Military Flag or General Officer staff experience.</li><li>Experience in government affairs, defense contracting, or business development within the energy or technology sectors.</li><li>Familiarity with nuclear energy, clean tech, or DoD procurement processes.</li><li>Prior internship or work experience in a startup or high-growth environment.</li></ul>Additional Requirements:&nbsp;&nbsp;<ul><li>Must be able to commit to 10-12 consecutive weeks in Winter/Spring 2026.&nbsp;</li><li>This internship will require working onsite at our Washington, DC office.</li><li>You may be asked to work extended hours or weekends occasionally to support project goals.</li></ul><div>Total Compensation and BenefitsRadiant'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 performance, experience, education, and qualifications.&nbsp;Benefits and Perks for Eligible Employees:<ul><li>Stock: Substantial incentive stock plan for all full-time employees.</li><li>Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.</li><li>One Medical: Sponsored memberships for employees and their dependents.</li><li>Vision: 100% top tier plan coverage + 50% for dependents.</li><li>Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.</li><li>Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.</li><li>8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.</li><li>Daily catered lunch. Free snacks and drinks.</li><li>Flexible PTO policy. Remote workday allocation.</li><li>Company and team-bonding events, happy hours and in-person camaraderie.</li><li>Beautiful El Segundo headquarters close to the Pacific Ocean.</li></ul>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. </div>

Spring 2026 Internship - Business Development (Government Relations)

About the Job

About the Company

Radiant

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