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, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. 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 leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.
Radiant is seeking an experienced IT Operations Manager to lead our service delivery function as we scale from a high-growth startup to a multi-site enterprise nuclear operator. The candidate will be directly responsible for the team, systems, and processes that ensure every employee across our California, Idaho, and Tennessee sites has what they need to operate securely and effectively from Day 1. The ideal candidate is equally comfortable managing a support team, owning a $1M+ asset inventory, and driving IT infrastructure projects for new facility buildouts. This role requires close collaboration with IT architecture, security, and HR teams across a fast-moving, compliance-sensitive environment.
Responsibilities & Duties:
Manage and mentor the IT Support team, including Helpdesk Associates and Leads, and set clear KPIs for ticket resolution, service quality, and user satisfaction.
Own the service desk platform (e.g., Freshservice, Jira Service Management) and design workflows that automate routine requests and surface team performance data.
Build and maintain an internal and user-facing Knowledge Base that converts tribal knowledge into repeatable, documented processes.
Own the end-to-end Joiner-Mover-Leaver process with a goal of 100% "Ready Day 1" status for all new hires across all sites.
Manage $1M+ in hardware assets with a rigorous tracking system for laptops, mobile devices (MDM), and peripherals across CA, ID, and TN.
Oversee licensing and procurement across our core SaaS stack, including Microsoft Gov, Zoom Gov, and Slack Gov.
Serve as IT project coordinator for upcoming office relocations and the Tennessee Site-K factory buildout.
Standardize and manage Zoom Government conference room environments for reliable, one-tap operation across all high-stakes meetings.
Manage vendor relationships and lead procurement for IT hardware and operational software.
Required Qualifications & Skills:
7+ years of professional working experience in IT Infrastructure, IT operations, IT engineering, or a related field.
3+ years in a formal management or team lead role within Support Operations or a Service Desk environment.
Proven experience scaling an IT organization from ~100 to 300+ employees in a fast-paced environment.
Demonstrated success managing physical IT projects such as office moves, network cabling oversight, or large-scale hardware refreshes.
Strong working knowledge of Identity Providers, including Okta or Entra ID.
Experience with MDM solutions such as Kandji, Jamf, or Intune.
Strong bias toward automation — consistently looks for opportunities to eliminate manual work using tools like Tines or native workflow engines.
Desired Qualifications & Skills:
5+ years in a formal management or team lead role within an IT engineering team.
Experience working within compliant environments such as CMMC, NIST 800-171, or SOC 2.
Familiarity with government-tier SaaS platforms (Microsoft Gov, Zoom Gov, Slack Gov).
Experience supporting IT operations across multiple geographic sites.
Experience with procurement and vendor management for hardware and software.
Additional Requirements:
Must be willing to work extended hours and weekends as necessary to accomplish our mission.
Must work 100% onsite at El Segundo HQ.
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.
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.