{"id":2053318,"url":"https://alion.io/job/terrapower-principal-engineer-structural-and-stress-analysis","title":"Principal Engineer, Structural and Stress Analysis","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":27,"ghost_share":0,"stale_share":0.815,"repost_share":0,"time_to_fill_p50_days":50,"computed_at":"2026-10-14T06:34:16Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"lead","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Bellevue, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":148722,"max":193146,"currency":"USD","period":"year","gross":null,"usd_annual":193146},"salary_estimate":null,"experience_years_min":15,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Python","optional":true},{"name":"SolidWorks","optional":true}],"status":"live","first_seen_at":"2026-10-07T20:23:06Z","employer_posted_date":"2026-10-07","last_verified_at":"2026-10-14T20:12:54Z","board_verified":true,"closed_at":null,"days_open":7,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":7},"description":"Principal Engineer, Structural and Stress Analysis\nTerraPower 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. In addition, as a federal contractor, TerraPower has instituted an Affirmative Action Plan (AAP) in an effort to proactively recruit, hire, and promote women, minorities, disabled persons and veterans.\nPrincipal Engineer, Structural and Stress Analysis\nThe Principal Engineer is a dedicated position act as a subject matter expert for TerraPower’s Natrium advanced nuclear reactor development, and technical leadership. The focus is on the mechanical performance of various reactor components, reactor structures, and nuclear island components. The Principal Engineer will report to the Structural and Stress Analysis Team Manager. He / She will work as part of a high functioning team of engineers and scientists focused on developing the design of next generation advanced nuclear reactors.\nResponsibilities\nPerform various analyses (stress, creep-fatigue, buckling, seismic, vibration) of reactor components using both classical tools such as Mathcad, and finite element analysis (FEA) software such as ANSYS.\nCollaborate with cross-functional teams to perform static and dynamic analysis using both linear and non-linear approach with FEA software.\nProficiency and expert knowledge of the ASME Sect III Code, including Div 5 high temperature design, is highly desired.\nWork with interdisciplinary teams to establish and optimize nuclear components design consistent with required functional and safety requirements.\nEstablish, review, approve and maintain documents of analysis results and design solutions.\nSupport the team’s development of required inputs and methodologies to establish structural sizing and load combinations for critical reactor components and interfaces.\nPerform peer review to maintain the expected quality standard as per the engineering quality assurance plan.\nAssist the Team Manager and Senior Manager when necessary for planning and strategy.\nMentor the engineers and team members as necessary to build a skilled and confident team.\nWork as a technical point of contact for various focused tasks.\nKey Qualifications and Skills\nB.S, M.S. or Ph.D. in Mechanical Engineering from an accredited university. Aerospace, Nuclear, and Civil Engineering degrees are also considered.\nMinimum 15 years of related experience with B.S. degree, or 12 years with M.S. degree, or 8 years with Ph.D. degree ability to produce a high-quality work product.\nExperience in the analysis of components to ASME Boiler Pressure Vessel Code Section III Div. 5 and 1.\nWorking experience with other codes and standards such as ASME Section VIII, ASME B31.1, and ASME B31.3, ASCE 4, ASCE 7, and/or ASCE 43 is highly desirable.\nExperience interfacing with other engineering disciplines.\nProficient in finite element stress analysis, mechanical analysis methods and commercial mechanical stress analysis modeling tools with emphasis on SolidWorks and ANSYS.\nStrong understanding of solid mechanics, fracture mechanics, and metal fatigue principles.\nCandidate should have demonstrated experience in mechanical analysis of equipment or components. This may include stress (including thermal) analysis, seismic analysis, buckling analysis, thermal cyclic analysis, and creep analysis.\nExperience working under stringent quality assurance requirements such as ASME NQA-1, MIL-Q-9858A, or ISO-9000.\nSkilled in detail-oriented review of drawings, documents, and calculations to ensure consistency, precision, and technical rigor\nExcellent communication skills, both written and oral\nCreative thinking with strong analytical/problem solving skills\nAbility to work multiple tasks concurrently with minimal direction\nFive plus years of previous experience in the nuclear industry.\nWorking experience utilizing Mathcad, and Python.\nCandidate must be able to work with in-person arrangements.\nThe successful candidate will possess a high degree of trust and integrity, communicate openly and display respect and a desire to foster teamwork.\nActual position starting level and title will be determined based on assessment of qualifications.\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: $148,722 - $193,146\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.\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":8683,"description_truncated":false,"requirements":{"experience_years_min":15,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","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":"2026-10-07T22:31:50Z"}],"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":50,"reasons":["conf:1","stale_co","win:early"],"computed_at":"2026-10-14T06:34:16Z"},"pay":{"stated_usd_annual":193146,"is_top_pay":true},"html_url":"https://alion.io/job/terrapower-principal-engineer-structural-and-stress-analysis","json_url":"https://alion.io/job/terrapower-principal-engineer-structural-and-stress-analysis.json","meta":{"generated_at":"2026-10-14T20:45:17Z","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":"search","counted_by":"address","units_charged":0,"used_today":0,"day_limit":null,"remaining_today":null,"minute_limit":null,"resets_at":"2026-10-15T00:00:00Z"}},"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-principal-engineer-structural-and-stress-analysis"},{"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-principal-engineer-structural-and-stress-analysis"},{"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-principal-engineer-structural-and-stress-analysis"},{"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-principal-engineer-structural-and-stress-analysis\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fterrapower-principal-engineer-structural-and-stress-analysis"}]}