Senior Mechanical Engineer ASME Lead

TerraPower • Bellevue, WA

2d

About The Position

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. TerraPower 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. In this role, you will create design solutions for the design development of various reactor structures and components for the Natrium Generation IV Reactor. Candidates must have extensive experience in equipment design. The Senior Engineer will report to the Reactor Enclosure System Component Manager. The Senior Engineer will work as part of a high functioning team of engineers and scientists focused on developing the design of next generation advanced nuclear reactors. The Senior Engineer we are seeking is a highly experienced engineer with a strong background in ASME Section III nuclear design. The successful candidate will be responsible for preparing, reviewing, and certifying Design Specifications (DS) and Design Reports (DR) in accordance with ASME Section III requirements, as well as supporting licensing, compliance, and customer deliverables.

Requirements

• Education: B.S. degree in Mechanical engineering or equivalent preferred
• Minimum of eight years of equipment / component design experience; relevant M.S. degree credited as two years of experience.
• Active Professional Engineer (P.E.) license required
• Working experience with ASME Boiler and Pressure Vessel Code Section III.
• Demonstrated experience certifying Design Specifications and Design Reports for nuclear pressure-retaining components
• Deep understanding of ASME Section III, NQA-1, and related NRC regulations.
• Experience in finite element stress analysis, mechanical analysis methods, and commercial mechanical stress analysis modeling tools with emphasis on ANSYS.
• Excellent writing and communication skills.
• Strong analytical/problem solving skills, creative thinker.
• The successful candidate will possess a high degree of trust and integrity, communicate openly and display respect and a desire to foster teamwork.

Responsibilities

• Perform detailed design, analysis, and documentation for ASME Section III Class HB pressure boundary components, which may include vessels, piping, valves, heat exchanger elements, and associated subcomponents used in nuclear facilities.
• Prepare design specifications, design reports, load evaluations, stress analyses, and code compliance calculations in accordance with ASME Section III rules and applicable NRC guidance.
• Conduct pressure boundary evaluations, including fatigue, thermal, seismic, and time-dependent material evaluations.
• Collaborate with multidisciplinary engineering teams to define design requirements, resolve technical issues, and optimize component performance.
• Interface with internal quality teams, third-party reviewers, and regulatory bodies to support audits, design reviews, and code certification processes.
• Support development of fabrication drawings, weld requirements, inspection criteria, material selection, and acceptance standards.
• Support material selection, fabrication requirements, inspection criteria, and acceptance standards for pressure boundary components.
• Participate in engineering change processes, nonconformance evaluations, and corrective action development as required.
• Maintain current knowledge of ASME Section III revisions, NRC guidance, and industry best practices.
• Provide technical mentorship to junior engineers as needed.

Benefits

• Competitive Compensation
• Salary, eligible to participate in discretionary short-term incentive payments
• Comprehensive Medical and Wellness Benefits for family or individual o VisionA o Dental o Life o Life and Disability o Gender Affirmation Benefits o Parental Leave
• 401k Plan
• Generous Paid Time Off (PTO) o 21 days of annually accrued PTO
• Generous Holiday Schedule o 10 paid holidays
• Relocation Assistance
• Professional and Educational Support Opportunities
• Flexible Work Schedule

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Number of Employees: 501-1,000 employees