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Senior Mechanical Design Engineer

TerraPower LLC.
CompanyTerraPower LLC.
CategoryEngineering
LocationBellevue
RemoteOn-site (inferred)
EmploymentNot stated
LevelSenior
SalaryNot stated by the employer
Posted22 Apr 2026
Last verified1 Aug 2026
SourceEmployer career page (greenhouse)
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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.” 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. 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.  Senior Mechanical Design Engineer 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 Mechanical Design Engineer will report to the Reactor Enclosure System Manager. The Senior Mechanical Design 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. Responsibilities Design of reactor structures and components from requirements through final design. Coordinate inputs and requirements from Engineering and Project teams to produce equipment and components design solutions. Perform scoping analysis and calculations for design options. Interface with the team’s engineering analysis activities. Technically manage supplier activities. Present equipment and components design results for design reviews. Assess technical merit of solutions provided by team members, including leading design reviews. Interface with junior engineers and subcontractors, providing direction and mentoring. Support continuous learning and application of nuclear industry best practices to maintain the highest quality of engineering design and proactively identify process change/enhancement opportunities. Required Qualifications and Skills   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. Working experience with ASME Boiler and Pressure Vessel Code Section III. Experience writing design specifications. Experience in Design for Manufacturability (DFM) and Design for Assembly (DFA). 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. Ability to work with minimum direction to solve challenging problems. Ability to work on multiple tasks concurrently during a given work week.
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Senior Mechanical Design Engineer — TerraPower LLC. · Job Opportunities API