{"id":2738475,"url":"https://alion.io/job/terrapower-senior-engineer-thermal-hydraulic-test","title":"Senior Engineer, Thermal Hydraulic Test","company":{"id":10977,"name":"TerraPower","domain":"terrapower.com","url":"https://alion.io/company/terrapower","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":80,"open_postings":26,"ghost_share":0,"stale_share":0.769,"repost_share":0.038,"time_to_fill_p50_days":38,"computed_at":"2026-10-23T05:54:15Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Everett, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":124115,"max":161188,"currency":"USD","period":"year","gross":null,"usd_annual":161188},"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ASME NQA-1","optional":false}],"status":"live","first_seen_at":"2026-10-16T15:52:30Z","employer_posted_date":"2026-10-16","last_verified_at":"2026-10-23T06:10:00Z","board_verified":true,"closed_at":null,"days_open":6,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":6},"description":"TerraPower is a nuclear technology company based in Bellevue, Washington. At its core, the company is working to raise living standards globally through a more affordable, secure, and environmentally friendly form of nuclear energy along with innovations in medical isotopes to improve human health. In 2006, TerraPower originated with Bill Gates and a group of like-minded visionaries who evaluated the fundamental challenges to raising living standards around the world. They recognized energy access was crucial to the health and economic well-being of communities and decided that the private sector needed to take action and create energy sources that would advance global energy deployment. TerraPower’s mission is to be a world leader in new nuclear technologies, while developing innovators and future leaders in the nuclear field. As a result, the company’s activities in the fields of nuclear energy and related sciences are yielding significant innovations in the safety and economics of nuclear power, hybrid energy and medical applications - all for significant human health benefits.\nTerraPower is seeking to hire highly motivated and forward-thinking professionals who are interested in focusing on advanced nuclear reactor research and development and influencing change within the nuclear power landscape and bringing forward the critical production of medical isotopes. TerraPower is an Equal Opportunity Employer. We do not discriminate in hiring on the basis of sex, gender identity, sexual orientation, race, color, religious creed, national origin, physical or mental disability, protected Veteran status, or any other characteristic protected by federal, state, or local law. \nSenior Engineer, Thermal Hydraulic Test\nReporting to the Manager of Thermal Hydraulic Testing, the Senior Thermal Hydraulic Test Engineer is responsible for designing and conducting thermal hydraulic tests to support analytic analysis of for the Natrium Demonstration Plant. The successful candidate will support all aspects of thermal hydraulic testing activities including planning, testing, document review, engaging with external vendors, and generating documents.\nResponsibilities\n\nDevelop and apply thermal-hydraulic analysis methods, including steady state and transient one-dimensional network hydraulic analyses.\nPerform calculations using first principles of heat transfer, fluid dynamics, and thermodynamics to support and validate analysis results.\nPerform analysis of reactor normal operations, upset events, emergency events and faulted events as defined in the ASME BPVC Section III to establish design, service, and test loadings and limits.\nPerform multiscale and multidisciplinary neutronics and control analyses involving the thermal hydraulics of sodium, molten salt, and non-condensable fluids.\nIntegrate with other engineering groups performing aspects of component, system, fuel, and control system design and related thermal-hydraulic testing.\nPerform code benchmarking and validation analyses to support code qualification and methodology development.\nKey Qualifications and Skills\nMaster’s degree in applicable field of Engineering\n+3 years of relevant experience in a testing / research and development environment preferred.\nExperience working in a laboratory environment\nStrong thermal-hydraulic analytical skills with one dimensional hydraulic network analysis, system codes experience and transient analysis.\nExperience with post-processing and documenting experiments.\nExperience with multiple types of testing (R&D, Acceptance, Validation, Qualification)\nAbility to work with a multidisciplinary team of engineers\nAbility to handle projects that include multiple objectives and ability to resolve conflicts between objectives.\nAbility to work on multiple tasks concurrently during a given work week.\nExcellent writing and communication skills.\nSafety conscience.\nAbility to work with minimum direction to solve challenging research and development problems.\nThe successful candidate will possess a high degree of trustworthiness and integrity, communicate openly and display respect and a desire to foster teamwork\nThis position is subject to qualification requirements in accordance with ANSI/ANS 3.1. Candidates must meet the minimum education and experience criteria applicable to the role, including relevant nuclear industry experience where required. Verification of data will be part of the hiring process.\n\nJob Functions:\nJob Functions are physical actions and/or working conditions associated with the position. These functions may also constitute essential functions for the job which the employee must be able to fulfill, with or without accommodation. Information provided below is to help describe the job so that the applicant has a reasonable understanding of the job duties/expectations. An applicant's ability to perform and/or tolerate these actions and conditions will be discussed and workplace accommodations may be made on a case-by-case basis following an individualized assessment of the applicant and other considerations, including but not limited to any governing safety standards.\nMotor Abilities: Sitting for extended periods, bending/stooping, grasping/gripping, fine motor control (hands)\nPhysical exertion and/or requirements: Minimal, with ability to safely lift up to 25 pounds.\nRepetitive work: Prolonged\nSpecial Senses: Visual and audio focused work\nWork Conditions: Stairs, typing/keyboard, standard and/or sitting working environment of >8 hours/day\nTravel required 0-10%\nTerraPower’s technology is controlled for export by various agencies of the U.S. Government. TerraPower must evaluate applicants who are foreign nationals (other than asylees, refugees, or lawful permanent residents) in accordance with U.S. Government export control requirements. To facilitate TerraPower’s export control reviews, you will be asked as part of the application process to identify whether you are a U.S. Citizen or national, asylee, refugee, or lawful permanent resident of the United States. Government export authorization approval times vary. Based on the business needs for a particular position, TerraPower may not consider a foreign national from a country if it is impracticable to obtain timely Government export approval.\nJob details\nSalary Range: $124,115 - $161,188\n\nAny salary offered within the posted salary band is based on market data and commensurate with the selected candidate’s qualifications and experience. This range is specific to Washington State.\nJob Type: Full-time\nBenefits:\nCompetitive Compensation\nSalary, eligible to participate in discretionary short-term incentive payments\nComprehensive Medical and Wellness BenefitsMedical\nVision\nDental\nLife and Disability\nGender Affirmation Benefits\n\nParental Leave\n401k Plan\nGenerous Paid Time Off (PTO)21 days of annually accrued PTO\n\nGenerous Holiday Schedule10 paid holidays\n\nRelocation Assistance\nProfessional and Educational Support Opportunities\nTerraPower Career and Benefits information: https://www.terrapower.com/contact-us/careers/","description_format":"text","description_chars":7072,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"master","optional":false},"security_clearance":false,"languages":[]},"benefits":["401k plan","Parental leave","Relocation assistance"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":true,"industries":["Nuclear Energy","Nuclear Engineering"],"lifecycle":[{"event":"open","at":"2026-10-16T19:52:45Z"}],"visa":[],"liveness":{"score":60,"band":"ok","label":"Likely open","p_open":1,"p_active":0.602,"p_room":1,"age_days":6,"expected_fill_days":38,"reasons":["conf:3","stale_co","win:early"],"computed_at":"2026-10-23T05:54:15Z"},"pay":{"stated_usd_annual":161188,"is_top_pay":true},"html_url":"https://alion.io/job/terrapower-senior-engineer-thermal-hydraulic-test","json_url":"https://alion.io/job/terrapower-senior-engineer-thermal-hydraulic-test.json","meta":{"generated_at":"2026-10-23T07:36:57Z","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":12266,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-24T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"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":10977},"rest":"https://alion.io/mcp/rest/get_company?id=10977"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fterrapower-senior-engineer-thermal-hydraulic-test"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"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%2Fterrapower-senior-engineer-thermal-hydraulic-test"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"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%2Fterrapower-senior-engineer-thermal-hydraulic-test"},{"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/terrapower-senior-engineer-thermal-hydraulic-test\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fterrapower-senior-engineer-thermal-hydraulic-test"}]}