Senior Engineer in Bellevue

Energy Jobline ZR; Bellevue (WA); On-site; USD 120,000 - 180,000; Full time

Job summary

System One is seeking an experienced Senior Mechanical Engineer to support the design and development of reactor structures for a next-generation IV advanced nuclear reactor program. The role focuses on high-integrity equipment design under ASME Section III and related regulatory requirements.

The successful candidate will lead design solutions, certify DS/DR, and collaborate with cross-functional teams on certification, licensing, and supplier oversight.

Qualifications

• B.S. in Mechanical Engineering required; MS may substitute for 2 years of experience.
• Active P.E. license is required.
• Experience with ASME Boiler & Pressure Vessel Code Section III.
• Proven experience certifying DS and DR for nuclear components.
• Experience in finite element stress analysis and mechanical analysis methods.
• Strong technical writing and communication skills.
• Travel 0–5%.

Responsibilities

• Certify Design Specifications (DS) and Design Reports (DR) for reactor components.
• Serve as Certifying Engineer and sign certifications as required.
• Maintain knowledge of ASME Section III and NRC regulations.
• Design reactor structures from requirements to final design.
• Coordinate inputs from project teams to develop robust solutions.
• Interface with analysis teams for stress evaluations.
• Oversee supplier activities and provide technical direction.
• Present results at design reviews and mentor junior engineers.

Skills

PE license

ASME Section III

DS/DR certification

FEA / FEM analysis

Technical writing

Regulatory compliance

Project leadership

Education

B.S. in Mechanical Engineering

M.S. degree (substitutes 2 years experience)

Tools

ANSYS

Job description

Job DescriptionJob Description

System One is seeking an experienced Senior Mechanical Engineer to support the design and development of reactor structures and components for a next- IV advanced nuclear reactor program. This role is focused on high-integrity nuclear equipment design and requires deep expertise in ASME Section III nuclear design and certification.

The Senior Engineer will work within a high-performing, multidisciplinary team of engineers and scientists developing advanced reactor systems. This role reports to the Reactor Enclosure System Component Manager and plays a critical role in design certification, licensing support, and supplier oversight.

Position Summary

The Senior Mechanical Engineer will lead and execute design solutions for reactor structures and pressure-retaining components, from requirements definition through final design. The successful candidate will be responsible for preparing, reviewing, and certifying Design Specifications (DS) and Design Reports (DR) in accordance with ASME Boiler & Pressure Vessel Code Section III, while supporting regulatory, compliance, and customer deliverables.

Key Responsibilities

• Certify Design Specifications (DS) and Design Reports (DR) for nuclear supports and/or nuclear pressure-retaining components

• Serve as Certifying Engineer, applying professional engineering judgment and signing certifications as required

• Maintain current knowledge of ASME Section III code updates, industry standards, and best practices

• Design reactor structures and components from requirements through final design

• Coordinate inputs and requirements from engineering and project teams to develop robust design solutions

• Perform scoping analyses and design calculations for alternative design options

• Interface with engineering analysis teams to support stress and mechanical evaluations

• Provide technical management and oversight of supplier activities

• Present design results at technical and formal design reviews

• Mentor junior engineers and provide technical direction to subcontractors

• Support continuous improvement and application of nuclear industry best practices

Required Qualifications & Skills

• B.S. in Mechanical Engineering or equivalent ()

  • Relevant M.S. degree may substitute for 2 years of experience

• Minimum 8 years of equipment/component design experience

  • Relevant M.S. degree may substitute for 2 years of experience

• Active Professional Engineer (P.E.) license (required)

• Demonstrated working experience with ASME Boiler & Pressure Vessel Code Section III

• Proven experience certifying Design Specifications and Design Reports for nuclear pressure-retaining components

• Strong understanding of ASME Section III, ASME NQA-1, and applicable NRC regulations

• Experience authoring formal design specifications

• Experience in finite element stress analysis, mechanical analysis methods, and commercial tools (ANSYS strongly )

• Excellent technical writing and verbal communication skills

• Strong analytical and problem-solving skills; creative and critical thinker

• High degree of trust and integrity with the ability to communicate openly, demonstrate respect, and foster teamwork

Physical & Work Requirements

• Ability to sit and/or stand for extended periods

• Bending, stooping, grasping, gripping, and fine motor control required

• Ability to safely lift up to 25 pounds

• Repetitive work and visual/audio focused tasks

• Standard office and engineering work environment (>8 hours/day)

• Travel: 0–5%

Additional Information

• Role supports advanced nuclear reactor development programs

• Employment may be subject to U.S. export control regulations

• Candidates may be required to verify work authorization status in accordance with applicable laws

Ref: #161-Managed Staffing Charlotte