Senior Mechanical Engineer - Supports

Bellevue, WA$139k–$208kPosted May 13, 2026

 

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 Engineer

The Senior Mechanical Engineer will report to a Reactor Enclosure System Manager and be focused on the design of reactor mechanical components and structures within the Natrium Generation IV Reactor. 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

  • Develop reactor components from requirements specification through final design and component fabrication and assembly.
  • Develop and maintain design specifications in accordance with project codes of record, including ASME BPVC Sect III Div 5.
  • Perform scoping analysis to support design modifications and evaluate sensitivities.
  • Collaborate with multidisciplinary engineering teams to define design requirements, develop detailed equipment interface controls, resolve technical issues, and optimize component performance.
  • Provide technical direction and oversight of supplier activities, working with or as the technical representative to ensure delivery of deliverables, as well as coordination and performance of technical reviews of deliverables.
  • Participate in planning efforts and manage detailed schedule activity execution for design activities within a team and across organizational boundaries.
  • Participate in engineering change processes, nonconformance evaluations, and corrective action development as required.
  • Maintain current knowledge of ASME BPVC Sect III revisions, NRC guidance, and industry best practices.

Required Qualifications and Skills 

  • B.S. in Mechanical or related discipline from an accredited university and 6+ years direct experience.
  • Demonstrated experience in the mechanical design of complex structures and equipment and multi-discipline integration. Previous experience with nuclear mechanical components, nuclear reactor equipment, or similar design is highly desired.
  • Experience in finite element stress analysis, mechanical analysis methods, and commercial mechanical stress analysis modeling tools with emphasis on ANSYS.
  • Familiarity with CAD software, SolidWorks preferred.
  • Working knowledge of the ASME BPVC Sect III Code is highly desired.
  • Excellent technical writing, communication, and presentation skills.
  • Candidate must be a self-starter and possess ability to coordinate and lead design efforts with minimal direction.
  • Ability to manage design activities that include many competing objectives and design constraints, with ability to resolve conflicts between objectives.
  • Experience working to quality standards on design activities, such as ASME NQA-1 or ISO 9001.
  • The successful candidate will possess a high degree of trust and integrity, able to communicate openly, and display respect and a desire to foster teamwork.

This 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.

Job Functions:

Job 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.

  • Motor Abilities: Sitting for extended periods, bending/stooping, grasping/gripping, fine motor control (hands)
  • Physical exertion and/or requirements: Minimal, with ability to safely lift up to 25 pounds.
  • Repetitive work: Prolonged
  • Special Senses: Visual and audio focused work
  • Work Conditions: Stairs, typing/keyboard, standard and/or sitting working environment of >8 hours/day
  • Travel required 0-10%

TerraPower’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.

Job details

Salary Range: $138,685 - $208,027 

Any 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.

Job Type:  Full-time

Benefits:

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

TerraPower Career and Benefits information:  https://www.terrapower.com/contact-us/careers/

 

 

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