Senior Mechanical Engineer (Vessels)
Bellevue, WA
Experience: 6
Education: BS
Category: Energy
Contractor Work Model: Remote
Brand: System One
Compensation Range: 69.00 - 115.00 Per Hour
Job ID: 350666
Date Posted: 10/28/2026
Shortcut: http://jobs.systemone.com/ZnKOpD
Job Title: Senior Mechanical Engineer (Vessels)
Location: Bellevue, WA
Type: Contract
Compensation: $69.00 - $115.00
Contractor Work Model: Remote – offsite
Hours: 40.0
Overview
System One is seeking a Senior Mechanical Engineer to create design solutions for the design development of various reactor structures and components. Candidates must have experience in vessel design. The Senior Engineer we are seeking is a highly experienced engineer, preferably with a strong background in ASME Section III nuclear design. The successful candidate will be responsible for preparing and reviewing Design Specifications (DS) and Design Reports (DR) in accordance with ASME Section III requirements, as well as supporting licensing, compliance, and customer deliverables
Tasks
- Perform detailed design, analysis, and documentation for ASME Section III Class HB and/or Section VIII division 2 vessels, including nozzles, flanges, support brackets, and other support elements used in nuclear facilities.
- Develop and maintain design specifications, calculations, load evaluations, and qualification reports in compliance with ASME and related nuclear codes and standards.
- Prepare engineering design packages, including performing or reviewing design calculations to ensure accuracy and code compliance.
- Collaborate with multidisciplinary engineering teams to define design requirements, resolve technical issues, and optimize component performance.
- Interface with internal quality teams, third-party reviewers, and regulatory bodies to support audits, design reviews, and code certification processes.
- Support material selection, fabrication requirements, inspection criteria, and acceptance standards for Class HB and Section VIII components.
- Participate in engineering change processes, nonconformance evaluations, and corrective action development as required.
- Maintain current knowledge of ASME Section III and/or VIII revisions, NRC guidance, and industry best practices.
Key Qualifications and Skills
- B.S. in Mechanical Engineering or related discipline from an accredited university.
- Minimum of six years of equipment / component design experience for level 10 or minimum of ten years of equipment / component design experience for level 11; relevant M.S. degree credited as two years of experience.
- 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.
- Working experience with ASME Boiler and Pressure Vessel Code Section III and or VIII division 2 (not design by rule).
- Ability to work with minimum direction to solve challenging problems.
- Ability to work on multiple tasks concurrently during a given work week.
- Familiarity with CAD, SolidWorks preferred.
- The successful candidate will possess a high degree of trust and integrity, communicate openly and display respect and a desire to foster teamwork.
System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.
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