Executive Assistant & Office Coordinator at Radiant in Washington, DC
- Company: Radiant
- Location: Washington, D.C.
- Job type: full time
- Workplace: onsite
- Posted: 2026-10-09
Job description
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: S
Executive Assistant & Office Coordinator on JobPost.