Executive Assistant & Office Coordinator

About Radiant

Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. Rising energy demand is straining the U.S. grid and driving up utility costs, emissions, and interconnection backlogs. Radiant decentralizes energy, producing power close to where it’s used. Its first reactor, Kaleidos, is a factory-built, 1-megawatt, fail-safe microreactor that can be transported by land, sea, or air and runs up to 5 years without refueling. Deployed locally without a decade-long build or permitting fight, Kaleidos provides independent power for critical infrastructure like military bases, data centers, hospitals, and remote sites. Founded in 2020, Radiant is under contract to deliver power to the U.S. Army, Air Force, Navy, and has pre-order agreements with Equinix, with deployments beginning in 2028.

Executive Assistant to the Chief Nuclear Officer & DC Office Coordinator

Radiant’s goals are ambitious – we will be the first company to mass-produce portable nuclear reactors. We have world-class engineers designing our Kaleidos 1MW microreactor, and we need a world-class team to build our business. Radiant is looking for a bright and eager executive assistant and office coordinator to join our Government Affairs team in DC and be a welcoming, friendly host to all visitors entering our office.

Responsibilities & Duties:

Executive Assistant to the Chief Nuclear Officer (CNO)

Manage CNO’s dynamic schedule, including frequent domestic and international travel, external meetings with high-profile officials, interviews with the press, and worldwide speaking engagements

Become familiar with Radiant’s wide-spanning public and private sector network and balance the CNO’s priorities across external stakeholder engagements and internal projects

Attend calls with event organizers on behalf of the CNO

You will often represent the CNO and the wider company – handle all communications and engagements (internal & external, virtual & in-person) with respectful professionalism

Office/Administrative

Assist with various office administration tasks (filing, supply ordering, restocking, inventory, tech set-up, and supplies organization)

Order catering and supplies for meetings, team engagement events, conferences, etc.

Assist People Operations (HR) with onsite event logistics, recruitment scheduling, and candidate experience

Spearhead ad-hoc office, administrative, or analytics tasks

Be the team culture creator: plan team happy hours, lunches, outings, etc.

Manage a monthly office budget and stay on top of expenses

Run our reception desk/front office, including:

Create a welcoming front-office experience for staff, visitors, and our community

Facilitate the visitor experience while enforcing critical security protocols

Direct vendors, contractors, and freight deliveries

Answer phone calls

Shipping & Receiving

Receive mail and deliveries, and track items in our inventory software

Ship packages and drop-off/pick-up at the post office, FedEx, or UPS

Project Management

Manage 3rd party contractors, responsible for both budget and timeline

Plan widely attended celebrations for 100+ guests 2-3 times per year: venue booking, catering, decoration, guest list & invitations, etc.

Required Skills and Qualifications

Ability to balance a myriad of priorities and coordinate across team calendars while maintaining professionalism

Inclination to raise your hand to tackle projects, even when you feel underprepared and/or the scope isn’t clearly defined

Ability to work independently in a very dynamic environment

Knowing when to pick up the phone and have a live conversation – for the sake of efficiency, clarity, tension diffusion, etc.

Positive attitude

Additional Requirements

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

Ability to lift ~50 lb loads, build basic furniture, walk up and down stairs

Benefits and Perks

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.

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.