{"id":4065900,"url":"https://alion.io/job/radiant-nuclear-lead-test-engineering","title":"Lead, Test Engineering","company":{"id":690814,"name":"Radiant Nuclear","domain":"radiantnuclear.com","url":"https://alion.io/company/radiantnuclear","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":90,"open_postings":25,"ghost_share":0,"stale_share":0.2,"repost_share":0,"time_to_fill_p50_days":76,"computed_at":"2026-11-11T05:49:22Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["El Segundo, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":140500,"max":202475,"currency":"USD","period":"year","gross":null,"usd_annual":202475},"salary_estimate":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"ASME NQA-1","optional":false},{"name":"FMEA","optional":false},{"name":"MATLAB","optional":false},{"name":"Python","optional":false}],"status":"live","first_seen_at":"2026-11-11T07:44:20Z","employer_posted_date":"2026-11-11","last_verified_at":"2026-11-11T11:21:35Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"About Radiant\nRadiant is an El Segundo, CA-based company building the world's only mass-produced, transportable nuclear microreactors. The U.S. grid is under growing strain, with power demand accelerating, driving higher utility costs, rising carbon emissions, and interconnection backlogs. Radiant has a solution, transportable, on-site power. Our first reactor, Kaleidos, is 1 megawatt: small enough to be factory-built, transported by land, sea, or air, and deployed wherever power is needed. 1 MW can power 1000 homes for five years. Ship it back and we refuel for a 20 year operating life. We made energy a product that can be used for critical infrastructure like military bases, data centers, hospitals, and remote sites, as well as the commercial main street businesses that keep America running. Founded in 2020, Radiant is under contract to deliver power to the U.S. Army, Navy and Air Force and has signed pre-order agreements with Equinix, with deployments beginning in 2028.\nAbout the Role\nRadiant is seeking a Lead, Test Engineering to own the strategy, execution, and team leadership for testing Kaleidos hardware and systems. This is a hands-on technical leadership role: you will directly manage a team of test engineers and serve as the technical owner for multi-discipline testing across the program. This is not limited to thermal, materials, structural, mechanical, and special-process testing.\nYou will lead test development across our product and build our test site from the ground up. This infrastructure will support rapid design iteration in development, evaluating thermal performance, material behavior, structural and mechanical response, leak integrity, and system reliability, and then transition into architecting acceptance testing for production units. You will work closely with design, analysis, materials, manufacturing, quality, supply chain, and operations teams to ensure designs are validated, robust, and production-ready.\nResponsibilities & Duties\nTest Hardware & Infrastructure Development\nLead requirements definition, design, and implementation of Radiant’s test hardware, including test rigs, fixtures, instrumentation, data acquisition, controls, and support systems for components, subsystems, and integrated systems.\n\nBuild, commission, calibrate, and maintain test capabilities across thermal, materials, mechanical, structural, and leak/flow disciplines.\n\nEstablish operating procedures, safety controls, and facility readiness for high-energy, high-temperature, vacuum, pressurized, and hazardous-materials environments.\n\nDefine equipment specifications, manage vendor selection and procurement, and plan test space layout.\n\nWork with quality to manage calibration programs, measurement traceability, and uncertainty analysis for all test equipment.\n\nTest Strategy, Planning & Technical Ownership\nOwn and lead the test strategy across development, qualification, and production acceptance phases.\n\nDefine test objectives, plans, success criteria, instrumentation strategies, and data requirements for hardware and systems.\n\nServe as the technical authority for test methods, measurement quality, and data integrity.\n\nTranslate analytical predictions and design requirements into targeted test campaigns that validate assumptions and retire risk.\n\nBalance test coverage, technical risk, schedule, and hardware availability to enable rapid iteration while maintaining safety and rigor.\n\nTest Execution & Data Analysis\nPlan and execute development, qualification, and acceptance tests, including functional, performance, environmental, transient, off-nominal, and endurance testing.\n\nOperate test hardware hands-on with a strong emphasis on repeatability, data quality, and safety.\n\nAnalyze test data to assess system performance, thermal and mechanical behavior, and reliability.\n\nCompare test results against analytical predictions and work with design teams to resolve discrepancies.\n\nCollaborate with engineers to conduct root cause investigations, identify anomalies or failures, and implement corrective actions supported by test evidence.\n\nBalance test coverage, technical risk, schedule, cost, and hardware availability to enable rapid iteration while maintaining safety and rigor.\n\nTechnical Leadership & Team Development\nProvide technical leadership and mentorship to test engineers and technicians.\n\nAct as a player-coach: remain hands-on while scaling testing capability, throughput, and organizational maturity.\n\nSupport hiring, onboarding, and technical development of test personnel.\n\nDevelop work estimates, test schedules, and status updates for program leadership.\n\nReview and approve test procedures, reports, and data packages.\n\nEstablish standards for test documentation, data management, and knowledge capture.\n\nHelp mature Radiant’s test processes, labs, and safety culture over time including standards for test documentation, data management, configuration control, and knowledge capture.\n\nCross-Functional Collaboration\nPartner closely with design and analysis engineers to ensure designs are testable and adequately validated.\n\nReview component and system-level design documentation with an eye toward test coverage, instrumentation, and risk.\n\nCollaborate with manufacturing, quality, and operations teams to support prototype, first-article, and production hardware testing.\n\nRepresent testing in design reviews, test readiness reviews, and technical leadership discussions.\n\nRequired Qualifications & Skills\nBachelor’s or Master’s degree in Mechanical Engineering or a related field, or equivalent experience.\n\n8+ years of experience in testing, development, or validation of complex mechanical, thermal, or electromechanical systems.\n\nHands-on experience building and operating test setups for high-energy or high-temperature hardware.\n\nExperience designing test instrumentation and data acquisition systems, and analyzing test data.\n\nExperience with leak testing methods (helium leak detection, pressure decay) and flow/thermal test setups.\n\nExperience correlating test results with analytical predictions and design intent.\n\nDemonstrated technical leadership and ability to drive complex test efforts to completion.\n\nStrong written, verbal, and organizational skills.\n\nDesired Qualifications & Skills\nPrior experience managing a team of test engineers or technicians.\n\nExperience with test facility or test stand development from the ground up, including safety reviews and hazard analysis (e.g., JHA, HAZOP, FMEA).\n\nExperience with hazardous-gas handling.\n\nExperience testing rotating turbomachinery, heat exchangers, fluid systems, mechanisms, or controls.\n\nExperience with structural test methods, including strain gauges, load cells, and test-to-FEA correlation.\n\nExperience with data acquisition and analysis tools (e.g., LabVIEW, Python, MATLAB, Beckhoff hardware, PLCs).\n\nFamiliarity with relevant industry standards (API, ASME, ISO, ASTM) and measurement uncertainty practices (e.g., ISO 17025).\n\nExperience with pressure vessel and pressure system testing and safety (e.g., ASME BPVC).\n\nExperience in nuclear, aerospace, defense, or other regulated, high-reliability environments.\n\nStartup or fast-paced hardware development experience.\n\nPrior nuclear experience is not required.\n\nAdditional Requirements\nMust be willing to work extended hours and weekends as necessary to accomplish our mission.\n\nMust work 100% onsite at El Segundo HQ.\n\nBenefits and Perks\nStock: Substantial incentive stock plan for all full-time employees.\n\nMedical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.\n\nOne Medical: Sponsored memberships for employees and their dependents.\n\nVision: 100% top tier plan coverage + 50% for dependents.\n\nDental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.\n\nVoluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.\n\n8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.\n\nNuclear Engineering Certificate Program: 100% covered educational program with Penn State University, for eligible employees, to rapidly upscale into nuclear.\n\nDaily catered lunch. Free snacks and drinks.\n\nFlexible PTO policy. Remote workday allocation.\n\nCompany and team-bonding events, happy hours and in-person camaraderie.\n\nBeautiful El Segundo headquarters close to the Pacific Ocean.\n\nTotal Compensation and Benefits\nRadiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s full-time 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.\nThe 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: .\nWe 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.\nThis 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.","description_format":"text","description_chars":9695,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Equity","Parental leave"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Nuclear Energy"],"lifecycle":[{"event":"open","at":"2026-11-11T11:21:35Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":76,"reasons":["conf:0","win:early"],"computed_at":"2026-11-11T12:16:59Z"},"pay":{"stated_usd_annual":202475,"is_top_pay":true},"html_url":"https://alion.io/job/radiant-nuclear-lead-test-engineering","json_url":"https://alion.io/job/radiant-nuclear-lead-test-engineering.json","meta":{"generated_at":"2026-11-11T12:16:59Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":21836,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-12T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":690814},"rest":"https://alion.io/mcp/rest/get_company?id=690814"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fradiant-nuclear-lead-test-engineering"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fradiant-nuclear-lead-test-engineering"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fradiant-nuclear-lead-test-engineering"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/radiant-nuclear-lead-test-engineering\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fradiant-nuclear-lead-test-engineering"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4065900}},{"tool":"search_jobs","arguments":{"company":"radiantnuclear.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4065900},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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