Reliability Engineering

About RadiantRadiant 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.Army, Air Force, Navy, and has pre-order agreements with Equinix, with deployments beginning in 2028.The RoleWe are looking for a Supply Reliability Engineer who builds supplier programs that prevent problems rather than react to them. While you'll have the technical depth to handle non-conformances and corrective actions when they arise, your primary focus is upstream: strengthening supplier processes, closing capability gaps, and building a supply base that performs without constant intervention.This is a builder role: the old house is being brought down, and a new foundation is being poured, but we still need to build the structure, apply the finishes, and pass final inspection. We're not here to maintain the status quo in nuclear quality — we're here to raise the bar. Radiant is building a supplier reliability program from the ground up with a singular goal: the right part, to the right standard, on time, every time. If you want to do the most meaningful quality work of your career in an industry that hasn't been disrupted in decades, this is that opportunity.Own, refine, and expand quality program documentation — including quality clauses, commodity-specific requirements, and the Supplier Quality Manual — building on existing foundations and authoring what doesn't yet exist.Own Radiant's procurement assurance and acceptance framework — define how items are accepted across supplier types and quality levels, establish purchase order quality requirements, certifications, material traceability, and compliance documentation, and build toward a graded, systematized model.Execute supplier audits and manage supplier performance — audit against Radiant quality program requirements, author findings to closure, and drive structured improvement plans with emphasis on early intervention over lagging indicators.Partner cross-functionally with design engineering, manufacturing, and materials teams to translate technical requirements into supplier-facing quality requirements before parts are ordered.Process and disposition supplier quality issues when they arise — deviation requests, non-conformance reports, supplier corrective action requests, root cause analysis, and verification of corrective action effectiveness.Bachelor's degree in Engineering, Quality, Materials Science, or a related technical field3-6 years of hands-on experience in supplier quality, supplier development, or supplier reliability engineering in a regulated industry (nuclear, aerospace, defense, or medical device)Demonstrated ability to independently process supplier quality transactions: deviation requests, non-conformance reports, supplier corrective action requests, purchase order quality reviews, and cert package review — without step-by-step guidanceProven experience owning or drafting quality program documents: quality clauses, supplier requirements, inspection instructions, or equivalentWorking knowledge of ISO 9001, AS9100, or equivalent quality management systems, including supplier audit methods and corrective action managementDesired Qualifications & Skills:Experience in the nuclear industry or direct familiarity with NQA-1, 10 CFR 50 Appendix B, 10 CFR 21, ASME BPVC Section III and/or VIIIManufacturing process depth in one or more of the following: machining, welding, casting, forming, special processes, or precision fabrication — sufficient to audit a supplier's process controls and identify gapsCertified NQA-1 Lead Auditor, or documented progress toward certificationQualified Inspector status (ASME Section III) or working toward itExposure to ISO 17025 accredited laboratories or third-party inspection bodiesExperience at an early-stage company or program where processes were built or advanced, not inheritedWho You Are:You take full ownership of your domain — you identify what needs to be built or improved, write the procedure when one doesn't exist, and drive it without waiting to be asked.Attention to detail is non-negotiable — in a safety-critical, auditable environment, imprecision in a quality record, a clause, or an audit finding has real downstream consequences.You care about the mission: bringing clean, reliable energy to places that need it most, and you understand that quality in this industry is not bureaucratic overhead — it's a safety imperative.Must be willing to work extended hours and weekends as necessary to accomplish our mission.Benefits and PerksStock: 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: Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.Flexible PTO policy. Remote workday allocation.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.If that’s you, contact us directly for immediate opportunities: View email address on click.appcast.io 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.Compensation Range: $100.5K - $142.8KLocationEl Segundo, CAEmployment TypeFull timeLocation TypeOn-siteDepartmentEngineeringReliability & QualityCompensation$100.5K - $142.8K • Offers Equity