About the role
Posted
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.
Job Summary:
We are seeking a T&E (Travel & Expense) Specialist to manage the processing and review of employee T&E activity and credit card charges for our nuclear energy company. You will help ensure expenses are accurate, policy-compliant, and properly recorded, while providing responsive support to employees who travel to project sites, vendor facilities, and regulatory meetings.
Key Responsibilities:
Review and process employee expense reports for accuracy, policy compliance, and proper documentation
Process corporate card transactions and reconcile card statements to the general ledger
Verify correct coding of expenses to cost centers, projects, and accounts, including project-specific cost tracking
Ensure compliance with company travel policy and applicable government contract cost rules (e.g., per diem, allowable costs), where relevant
Respond to employee questions and resolve expense report issues in a timely, professional manner
Follow up on missing receipts, overdue reports, and unreconciled items
Prepare periodic reports on travel spend, policy exceptions, and outstanding balances
Support month-end close activities related to T&E accruals
Identify process improvements and help maintain T&E policy documentation
Required Qualifications:
Associate's or Bachelor's degree in Accounting, Finance, Business Administration, or a related field (or equivalent experience)
3+ years of experience in travel and expense processing, accounts payable, or a similar finance role
Experience with expense management platforms (e.g., Ramp, Concur, Expensify, Workday, Coupa)
Strong working knowledge of Microsoft Excel
Attention to detail and strong organizational skills
Clear written and verbal communication skills
Ability to handle confidential financial information with discretion
Preferred Qualifications:
Experience supporting a regulated industry such as nuclear, energy, aerospace, or defense
Familiarity with government contract cost principles (e.g., FAR, DCAA requirements) or Department of Energy contracting
Experience with corporate card programs and reconciliation
Familiarity with ERP systems (e.g., SAP, Oracle, NetSuite)
Experience with international travel, foreign per diem rates, and multi-currency expenses
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: recruiting@radiantnuclear.com.
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.