Senior Mechanical Engineer - Supports

TerraPower·Bellevue, Washington, United States·Posted July 2026

Nuclear industryUS only

About this role

Senior Mechanical Engineer supporting design development of reactor structures and components for TerraPower's Natrium Generation IV Sodium-Cooled Fast Reactor. Design structural equipment and supports (frames, brackets, hangers) under ASME Section III nuclear design standards, working within a multidisciplinary engineering team.

Responsibilities

—Perform detailed design, analysis, and documentation for ASME Section III Class NF structural supports, including frames, brackets, hangers, and support elements
—Develop and maintain design specifications, calculations, load evaluations, and qualification reports in compliance with ASME Section III and related nuclear codes
—Prepare engineering design packages and perform/review design calculations for code compliance
—Collaborate with multidisciplinary teams to define design requirements, resolve technical issues, and optimize component performance
—Interface with quality teams, third-party reviewers, and regulatory bodies to support audits, design reviews, and code certification
—Support material selection, fabrication requirements, inspection criteria, and acceptance standards for Class NF components
—Participate in engineering change processes, nonconformance evaluations, and corrective action development
—Maintain current knowledge of ASME Section III revisions, NRC guidance, and industry best practices

Qualifications

—B.S. in Mechanical Engineering or related discipline from accredited university
—Minimum 6 years of equipment/component design experience (relevant M.S. may substitute 2 years)
—Experience in Design for Manufacturability (DFM) and Design for Assembly (DFA)
—Deep understanding of structural and seismic design
—Experience in finite element stress analysis and commercial mechanical analysis tools (ANSYS emphasis)
—Excellent writing and communication skills
—Strong analytical and problem-solving skills with creative thinking ability
—Ability to work with minimal direction and manage concurrent tasks