Intermediate Heat Exchanger Lead Engineer

Bellevue, Washington, United States | Natrium | Full-time | Fully remote


TITLE:                 Intermediate Heat Exchanger Lead Engineer

LOCATION:         Bellevue, WA, USA 


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 act 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. 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. 

Intermediate Heat Exchanger Lead Engineer

The Intermediate Heat Transport Lead Engineer reports to the Primary Heat Transport Manager and is focused on the design of the Intermediate Heat Exchanger. In this role, you will act as the design lead for the Intermediate Heat Exchanger, as well as contribute to the design of the primary heat transport system. The successful candidate is one who takes ownership of the development of the IHX, by developing a deep knowledge of the technical and project aspects of the component. The Intermediate Heat Exchanger Lead Engineer will work as part of a high-performing team of engineers.



  • Develop and manage technical requirements for the Intermediate Heat Exchanger. This responsibility will include preparing or reviewing the Intermediate Heat Exchanger Design Specification and ensuring the correct application of ASME code rules to the design and fabrication of the component.
  • Support the intermediate heat exchanger design by performing thermal hydraulic or mechanical analyses using hand calculation or software-based methods to support the design.
  • Perform technical vendor oversight of intermediate heat exchanger designer.
  • Review and perform owners’ acceptance of intermediate heat exchanger vendor deliverables.
  • Lead design reviews for Intermediate Heat Exchanger.
  • Develop testing requirements, test specifications, and provide technical oversight for testing related to the Intermediate Heat Exchanger.
  • Work with other lead engineers on physical and fluid interface requirements and design.
  • In addition to the role as Intermediate Heat Exchanger Lead Engineer, this engineer will support the primary heat transport system design by:
  • Contributing to the design of nuclear and industrial process systems and sub-systems from requirements through final design. 
  • Coordinating with other teams regarding the results of analyses, such as thermal, seismic, structural, pipe stress, heat transfer, and other analyses performed by others and integrate the results into plant design and operational decisions.
  • Identify and ensure effective application of correct design codes into the design of plant systems such as ASME, ANS, ASTM, IEEE, NFPA, etc. 
  • Analyze and allocate regulatory criteria and standards to complex mechanical and process system design. 
  • Support planning efforts and maintain schedule adherence for design activities within a system, as well as their integration with an overall plant design delivery schedule. 
  • Interface with the design team to create and manage drawing packages of system designs, including but not limited to Piping and Instrumentation Diagrams (P&IDs), 3D models, and system interface drawings. 
  • Interface with design disciplines (such as mechanical, instrumentation and controls, civil, and nuclear) to identify and develop plant design information and specify system design and performance criteria. 
  • Provide technical direction and oversight of supplier projects, working with the contract administrator to ensure delivery of data and other deliverables, as well as coordination and performance of technical reviews of deliverables. 
  • Establish and maintain system requirements and design basis documents for the primary heat transport system. 
  • Propose and initiate testing programs for plant system qualification, as needed. 
  • Provide Support and oversight during test execution, evaluation of test results, and reporting of test results. 
  • Generate design package for systems, sub-systems, and equipment designs including coordination of calculations, design reports, mechanical drawings, and engineering design specifications. 
  • Support licensing activities related to the Natrium demonstration project by assisting in the preparation of licensing submittals,
  • Support design reviews as plant system and subsystem designs are established and refined. 


Key Qualifications and Skills   

  • B.S. in Mechanical or related discipline from an accredited university and 10+ years direct experience. Advanced degrees can be accepted in lieu of experience.
  • Experience applying ASME Section III Code to the design of tube and shell heat exchangers. Light water reactor steam generator design is a plus. 
  • Experience with tube-and-shell heat exchanger design and applying TEMA stanards, preferably with experience with heat exchangers that provide a portion of a reactor primary coolant pressure boundary.
  • Demonstrated experience in the design of complex mechanical systems, structures and equipment.
  • Previous experience with nuclear reactors or similar high-performance system or equipment design is highly desired.  
  • Excellent technical writing, communication, and presentation skills. 
  • Attention to detail and aspiration for technical excellence. 
  • Candidate must be a self-starter and possess ability to coordinate and lead a design team’s effort with minimal direction. 
  • Ability to handle projects that include many competing objectives and design constraints, with ability to resolve conflicts between objectives. 
  • Ability to work on simultaneous tasks that require a multi-disciplinary approach. 
  • Experience working to quality standards on design activities, such as ASME NQA-1. 
  • On-site arrangement is preferred, but remote work will be considered based on candidate assessment.
  • 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. 
  • Actual position starting level will be determined based on assessment of qualifications.


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 and/or standing for extended periods, bending/stooping, grasping/gripping, fine motor control (hands) 
  • Physical exertion and/or requirements: Minimal, with ability to safely lift up to 20 pounds 
  • Repetitive work: Prolonged 
  • Special Senses: Visual and audio focused work 
  • Work Conditions: Stairs, typing/keyboard, standing and/or sitting working environment of >8 hrs./day 
  • Travel required  0-5% 


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 Level 11:  $120,672 - $201,119

Salary Range Level 12: $163,702 - $226,844

*Typically, our employee salaries are within .90 – 1.0 of the mid-point of the posted salary bands.  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


  • Competitive Compensation
  • Salary, eligible to participate in discretionary short-term incentive payments
  • Comprehensive Medical and Wellness Benefits Medical
    • Vision
    • Dental
    • Life
    • 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
  • Flexible Work Schedule

 TerraPower Career and Benefits information:

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