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Radiant is an El Segundo, CA-based startup building the world's first mass-produced, portable nuclear microreactors. The company's flagship product, Kaleidos, is a 1-megawatt, fail-safe microreactor designed for rapid deployment to hospitals, data centers, remote sites, and military bases. Founded in 2020, Radiant is preparing to test its first reactor at Idaho National Laboratory with initial customer deliveries expected in 2028.
This role combines executive support and office operations responsibilities within Radiant's Government Affairs team in Washington, D.C.
EXECUTIVE ASSISTANT RESPONSIBILITIES:
- Manage the Chief Nuclear Officer's dynamic schedule, including frequent domestic and international travel, external meetings with high-profile officials, press interviews, and speaking engagements worldwide
- Develop familiarity with Radiant's extensive public and private sector network, balancing CNO priorities across external stakeholder engagements and internal projects
- Attend calls with event organizers on behalf of the CNO
- Represent the CNO and company through all communications and engagements (internal/external, virtual/in-person) with professionalism
OFFICE & ADMINISTRATIVE RESPONSIBILITIES:
- Manage office administration tasks including filing, supply ordering, restocking, inventory management, tech setup, and supplies organization
- Order catering and supplies for meetings, team events, and conferences
- Support People Operations with onsite event logistics, recruitment scheduling, and candidate experience
- Execute ad-hoc office, administrative, and analytics projects
- Serve as team culture creator: plan team happy hours, lunches, outings, and celebrations
- Manage monthly office budget and expense tracking
RECEPTION & FRONT OFFICE:
- Create welcoming front-office experience for staff, visitors, and community
- Facilitate visitor experience while enforcing security protocols
- Direct vendors, contractors, and freight deliveries
- Answer phone calls
SHIPPING & RECEIVING:
- Receive mail and deliveries; track items in inventory software
- Ship packages and manage post office, FedEx, and UPS logistics
PROJECT MANAGEMENT:
- Manage third-party contractors, overseeing both budget and timeline
- Plan large-scale celebrations for 100+ guests 2-3 times annually, including venue booking, catering, decoration, guest lists, and invitations
REQUIREMENTS:
- Ability to balance multiple priorities and coordinate across team calendars while maintaining professionalism
- Willingness to tackle projects independently, even when underprepared or scope is undefined
- Ability to work independently in a dynamic environment
- Strong judgment about when to use phone communication for efficiency, clarity, and conflict resolution
- Positive attitude
- Willingness to work extended hours and weekends as necessary
- Ability to lift approximately 50 lb loads, build basic furniture, and navigate stairs
- Subject to U.S. export control compliance requirements
