{"id":521348,"url":"https://alion.io/job/kairospower-senior-engineer-reactor-vessel","title":"Senior Engineer, Reactor Vessel","company":{"id":97164,"name":"Kairos Power","domain":"kairospower.com","url":"https://alion.io/company/kairospower","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":83,"open_postings":6,"ghost_share":0,"stale_share":0.5,"repost_share":0,"time_to_fill_p50_days":200,"computed_at":"2026-10-26T05:57:25Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Alameda, United States","Albuquerque, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":140600,"max":165400,"currency":"USD","period":"year","gross":null,"usd_annual":165400},"salary_estimate":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ASME NQA-1","optional":false},{"name":"Design Controls","optional":false},{"name":"FMEA","optional":false},{"name":"SolidWorks","optional":false}],"status":"live","first_seen_at":"2026-07-09T18:29:41Z","employer_posted_date":"2026-10-01","last_verified_at":"2026-10-26T16:46:35Z","board_verified":true,"closed_at":null,"days_open":109,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":109},"description":"Company Overview\nKairos Power is a new nuclear energy technology and engineering company whose mission is to enable the world’s transition to clean energy, with the ultimate goal to dramatically improve people’s quality of life while protecting the environment. This goal will be accomplished through the commercialization of the fluoride-salt-cooled, high-temperature reactor (FHR) that can be deployed with robust safety, affordable costs, and flexible operation to accommodate the expansion of variable renewables.\nJob Summary \nThe Reactor Vessel System team is seeking a highly motivated Senior Engineer to join the growing Reactor Systems department. In this role, you will have the opportunity to work directly on the design, analysis, integration, fabrication, and deployment of reactor vessel structures, systems, and components for a first-of-a-kind fluoride-salt-cooled, high-temperature reactor. \nReporting directly to the Head of Reactor Systems, the position will support the development of reactor vessel hardware and interfaces, including the vessel shell, penetrations, supports, closures, structural interfaces, and related mechanical components. This position requires a strong aptitude for mechanical design, systems engineering, high-temperature structural design, engineering analysis, and component lifecycle management. The role will regularly interface with multidisciplinary teams including, nuclear design, thermal hydraulics, fuels and materials, safety analysis, remote handling, manufacturing, quality, plant design integration, and instrumentation and controls. \nYou will work closely with adjacent reactor system teams to mature reactor vessel design requirements, resolve technical and spatial interfaces, support design trades, and deliver hardware that meets safety, performance, manufacturability, inspection, and maintainability objectives. \nResponsibilities \nOwn and manage design scope for reactor vessel components, interfaces, and hardware packages.\nDevelop and maintain reactor vessel requirements, design bases, interface definitions, verification plans, and supporting technical documentation.\nLead the mechanical design and technical execution of assigned reactor vessel structures, components, and interfaces, ensuring compliance with system requirements and design objectives. \nCoordinate with mechanical, civil, I&C, safety analysis, manufacturing, and plant integration teams to define spatial, thermal, structural, and functional interfaces.\nLead or support design integration reviews to ensure reactor vessel and interfacing SSC designs are compatible, constructible, inspectable, and maintainable.\nPrepare and review mechanical engineering documentation and perform or guide supporting analyses, including drawings, design reports, test plans, memos, specifications, calculations, technical reports, thermal and structural analyses, pressure-boundary evaluations, FMEAs, and other mechanical design assessments.\nAssess reactor vessel compliance with applicable codes and standards such as ASME, ANSI, ASTM, ASME Boiler and Pressure Vessel Code, and other relevant standards.\nEngage with manufacturing, assembly, suppliers, and operations teams to support reactor vessel fabrication, inspection, installation, testing, and maintenance, including review of fabrication drawings, manufacturing processes, inspection plans, material certifications, and nonconformance dispositions.\nMaintain assigned design records in accordance with configuration management, document control, and technical change control processes. \nLead technical interactions with suppliers for assigned reactor vessel components, including specification development, technical evaluations, manufacturing support, acceptance criteria, and resolution of technical issues. \nDevelop technical estimates, identify technical risks, and provide engineering input supporting project planning, cost, schedule, and execution decisions.-\nProvide independent engineering recommendations and technical decision support within assigned design scope, identifying risks, assumptions, and recommended mitigation strategies.\nParticipate in peer design reviews, technical audits, hazard and failure analyses, and design readiness reviews to ensure compliance with quality and performance objectives.\nProvide technical mentorship, design guidance, and engineering coaching to junior engineers and interns while promoting engineering rigor and best practices.\nOther duties as assigned. \n Qualifications \nBachelor’s or advanced degree in Mechanical Engineering, Nuclear Engineering, Materials Engineering, Structural Engineering, or a related discipline is required.\n8+ years of relevant experience in mechanical design, nuclear component design, pressure vessel design, high-temperature systems, structural components, or complex hardware development is required.\nDemonstrated experience independently leading design, analysis, fabrication support, testing, or qualification of pressure vessels, reactor vessels, or other safety-significant mechanical systems is required. \nExperience developing and reviewing engineering documentation, including mechanical drawings, specifications, calculations, design reports, test plans, and technical reports is required.\nExperience with reactor component fabrication and lifecycle management processes, including equipment qualification, inspection, testing, maintenance, or related programs, consistent with qualifications in the provided examples is desired.\nExperience working to a quality standard such as ASME NQA-1, ISO 9001, or equivalent quality program requirements is desired.\nFamiliarity with applicable codes and standards such as ASME Boiler and Pressure Vessel Code Section VIII, Section III, ANSI, ASTM, ASME Y14.5, or related standards is desired.\nExperience with design for manufacturing, design for assembly, dimensional inspection, GD&T, welding, machining, or fabrication of large metallic components is desired. \nKnowledge, Skills & Abilities \nStrong understanding of mechanical design principles, structural mechanics, pressure-boundary design, thermal expansion, bolted joints, weldments, and metallic component behavior.\nKnowledge of high-temperature design considerations, including thermal stress, creep, fatigue, creep-fatigue, material degradation, or irradiation effects.\nProficiency with 3D CAD tools such as SolidWorks, AVEVA, or equivalent.\nFamiliarity with engineering analysis tools and methods for thermal and structural modeling.\nKnowledge of FEA methods and ability to apply analysis results to mechanical design decisions.\nAbility to interpret and apply industry codes and standards to reactor vessel and pressure-retaining component design.\nKnowledge of system safety and reliability analysis methods such as FMEA, HAZOP, and FTA.\nKnowledge of configuration management, design control, interface control, and technical change control processes.\nAbility to translate system-level requirements into component-level requirements, interfaces, and verification activities. \nWorking knowledge of supplier oversight, procurement specifications, and technical acceptance criteria for engineered components.\nAbility to apply systems thinking to evaluate interdependencies across reactor subsystems.\nStrong analytical problem-solving abilities to resolve complex design issues efficiently.\nFlexibility to consistently deliver tangible results in a rapid and dynamic work environment.\nSelf-motivated with strong time management skills and an ownership mentality.\nCapability to mentor and train junior engineers and interns.\nDedication to safety and risk management consistent with the expectations of designing and deploying components important to the safe operation of a nuclear reactor.\nAbility to proactively collect, manage, and transfer knowledge.\nExcellent verbal, written communication/presentation, and interpersonal skills\nAbility to seek different and novel ways to create efficiencies when working on problems, challenges, and issues. \n Physical Conditions \nRemaining in a stationary position, often standing or sitting, for prolonged periods.\nAdjusting, moving, transporting, installing, positioning, or removing objects up to 30 pounds in all directions.\nWorking with hand tools to assemble equipment and hardware as necessary.\nAscending or descending ladders, stairs, scaffolding, ramps, scissor lifts, articulated boom lifts, and similar equipment as needed. \n Environmental Conditions \nGeneral office environment.\nLaboratory, manufacturing, assembly, or test facility environment.\nSupplier, construction, or installation site environment as needed. \n Safety and PPE \nReading and interpreting hazardous warning signs.\nReporting issues with equipment or unsafe conditions.\nWearing proper PPE, including face mask, face shield, gloves, safety shoes, or other required protective equipment. \nTravel \nSome travel may be required (20%), including travel to Kairos Power sites, suppliers, fabrication shops, test facilities, or installation sites. \n Additional Requirements \nOccasionally requires schedule flexibility.\nOccasionally requires extended hours to support critical project timelines, fabrication activities, testing, or deployment milestones. \nThe salary range for this position is $140,600 to $165,400 for employees working onsite at our Alameda, CA headquarters. The range provided in this job posting represents the typical range or starting rate of candidates hired in California. Factors that maybe used to determine your actual salary may include your education, experience, knowledge, skills, ability and the market data for your work location, and a comparison to other employees already in the role. \nAbout our Benefits\nWe know that we have some of the most talented and dedicated employees, and we believe in rewarding them accordingly. If you work here, full-time employees (excludes interns) expect to have access to the benefits below:\nCompetitive compensation packages\nMedical, dental and vision benefits for employees and their dependents\nPaid Vacation\n401(k) and pre-tax health insurance, dependent care, and commuter benefits (FSA)\nKairos Power is committed to building a diverse workforce that reflects the communities where we do business. Kairos Power is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. We actively welcome people of different experiences, abilities, and perspectives.\nKairos Power participates in E-Verify.\nCandidates only, no recruiters or agencies please.\nNote: You are applying for a position that is located in a facility that handles information that is subject to export control restrictions by the Department of Energy under 10 CFR Part 810. To work in this facility, you need to be authorized by the Department of Energy to access Part 810-controlled information. Foreign nationals who are citizens of countries that are not on the Department of Energy’s general authorization list (link below) are not permitted to work in our facility unless the Department of Energy issues an export control license to the company to permit that individual to have access to Part 810-controlled information. 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