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Lead Principal Engineer, Reactor Design

Job in Bellevue, King County, Washington, 98009, USA
Listing for: TerraPower
Full Time position
Listed on 2026-09-01
Job specializations:
  • Engineering
    Electrical Engineering, Mechanical Engineer, Energy Engineer, Systems Engineer
Job Description & How to Apply Below

Lead Principal Engineer, Reactor Design

Bellevue, WA, USA

Terra Power 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, Terra Power 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. Terra Power'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.

Terra Power 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. Terra Power 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.

Lead Principal Engineer, Reactor Design

The Lead Principal Engineer, Reactor Design reports directly to the Reactor Design Senior Manager and is focused on the technical leadership and delivery of the reactor and its components and structures. In this role, you will act as a Lead Principal Engineer supporting Terra Power's Natrium project. The successful candidate will integrate and coordinate with engineers working on the reactor and interfacing systems as part of a high-performing team of engineers and scientists.

Responsibilities

  • Provide expert level knowledge and technical leadership in the design of integrated system, structures, and components from requirements definition through final design.
  • Act as technical authority for a broad range of reactor design topics and components, develop and advise solutions to critical design areas and challenges, and champion effective design solutions and engineering improvement in the reactor design team.
  • Lead and perform senior technical review of engineering products as an extension of the project design authority, including specialist topics, cross-functional products, critical activities requiring focused resolution, and integrated functional reviews across the reactor systems and their interfacing SSCs. Bring together multi-department groups as well as chief engineers in executing highly effective design reviews and product reviews.
  • Develop standards for a complete product lifecycle, such as but not limited to necessary construction and fabrication details, startup and testing plans, maintenance and inspections, and decommissioning plans.
  • Guide organization in the selection and application of project codes of record, including ASME BPVC Sect III Div 5 and QME-1.
  • Mentor and support the continuous development of a performing engineering team, including individual mentoring as well as organizational learning such as training development and delivery.
  • Assess complex integrated thermal-hydraulics in the primary system, including safety performance targets, detailed multi-physics analysis models, and transient analysis inputs to structural design.
  • Verify correct and complete application of regulatory criteria, codes and standards, industry guidance, and design programs to complex mechanical design challenges.
  • Provide technical direction to engineering execution of supplier activities, including engineering design principles and…
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