Mechanical Design Engineer
Bellevue, Washington
Experience: 0
Category: Other
Contractor Work Model: Hybrid
Brand: System One
Compensation Range: 52.00 - 85.00 Per Hour
Job ID: 342288
Date Posted: 04/21/2026
Shortcut: http://jobs.systemone.com/UGFEhE
Job Title: Mechanical Design Engineer
Location: Bellevue, Washington
Type: Contract
Compensation: $52 - $85 hourly
Contractor Work Model: Hybrid
System One is seeking a Mechanical Design Engineer to support the Molten Chloride Fast Reactor (MCFR) program. This position will report to the MCFR Mechanical Design Manager and play a critical role in the mechanical analysis, scripting, and design scoping of reactor components. The role will begin with material property development for finite element analysis and grow into broader design analysis responsibilities.
You will work within a high-performing, multi-disciplinary engineering team that includes materials science and thermal-hydraulics experts to develop novel analysis methodologies and support the design of next-generation reactor hardware.
Key Responsibilities:
-
Develop material models and contribute to novel analysis methodologies within the Mechanical Design discipline
-
Perform basic sizing calculations and mechanical scoping of reactor components
-
Conduct finite element mechanical analyses using commercial tools (e.g., ANSYS)
-
Read and interpret design standards, specifically ASME BPVC Section III, Division 5
-
Perform technical reviews of internal and supplier-provided designs and deliverables
-
Work collaboratively with engineering leads and subject matter experts to support design validation
Qualifications and Skills:
-
B.S. in Mechanical Engineering or related field with 4+ years of relevant experience
— OR — M.S. with 2+ years of experience -
Engineer-in-Training (EIT) or Professional Engineer (PE) license preferred
-
Recent experience with ANSYS or other mechanical analysis tools
-
Scripting experience preferred, particularly with Python and ANSYS APDL
-
Strong understanding of material failure mechanisms and mechanical design codes
-
Proficiency in CAD tools; SolidWorks preferred
-
Demonstrated ownership of hardware design and delivery
-
High attention to detail and commitment to technical excellence
-
Excellent written and verbal communication skills
-
Ability to work both independently and collaboratively in a cross-functional team
-
A high degree of integrity, openness, and a team-oriented mindset is essential
-
Actual position level and title will be based on qualifications and experience
Job Functions and Work Conditions:
Motor Abilities:
Sitting and/or standing for extended periods, bending/stooping, grasping/gripping, fine motor control (hands)
Physical Requirements:
Minimal exertion; must be able to safely lift up to 25 pounds
Repetitive Work:
Prolonged computer and analytical tasks
Special Senses:
Visual and audio-focused work, including computer-based design and analysis
Work Environment:
Standard office setting, stairs, keyboard use, typical 8+ hour workdays
Travel:
Minimal (0–5%)
-
Senior Mechanical Design Engineer
Bellevue, Washington
Position Overview: System One is seeking a Senior Mechanical Design Engineer to support the Molten Chloride Fast Reactor (MCFR) program and the Molten Chloride Reactor Experiment (MCRE). This role plays a key part in designing and analyzing mechanical ...
Date Posted: 04/21/2026 Recommended
-
Senior Engineer
Bellevue, Washington
System One is seeking an experienced Senior Mechanical Engineer to support the design and development of reactor structures and components for a next-generation Generation IV advanced nuclear reactor program. This role is focused on high-integrity nucl...
Date Posted: 04/21/2026 Recommended
-
Component Design Engineer (RPA) – Contract
Bellevue, WA
Job Title: Component Design Engineer (RPA) – Contract Type: Contract Compensation: $52.00 - $85.00 per hour Contractor Work Model: Remote – offsite System One is seeking a Contractor to create design solutions for the design development of various reac...
Date Posted: 05/12/2026 Recommended
-
Senior Mechanical Engineer (Vessels)
Bellevue, WA
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 soluti...
Date Posted: 05/13/2026 Recommended
-
Senior Mechanical Engineer
Bellevue, WA
Job Title: Senior Mechanical Engineer Location: Bellevue, WA Type: Contract Contractor Work Model: Remote – offsite Hours: 40.0 Responsibilities Design reactor structures and components from concept through final design. Develop equipment and component...
Date Posted: 04/20/2026 Recommended
-
Senior Mechanical Engineer (Supports)
Bellevue, WA
Job Title: Senior Mechanical Engineer (Supports) 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 solut...
Date Posted: 05/20/2026 Recommended
-
Senior Component Design Engineer (RPA) – Contract
Bellevue, WA
Job Title: Senior Component Design Engineer (RPA) – Contract Type: Contract Compensation: $56.00 - $95.00 per hour Contractor Work Model: Remote – offsite Responsibilities Design solutions for reactor structures and components, including the rotatable ...
Date Posted: 05/13/2026 Recommended
-
Senior Structural Analyst
Bellevue, Washington
Senior Structural Analyst – Contract Location: Bellevue, WA (Remote Available) Type: Contract Overview System One is seeking a Senior Structural Analyst to support advanced nuclear reactor development programs focused on next-generation energy technolo...
Date Posted: 05/27/2026 Recommended
-
Fuel Handling Mechanical Design Engineer
Bellevue, WA
Job Title: Fuel Handling Mechanical Design Engineer Location: Bellevue, WA Type: 12-month Contract Contractor Work Model: Remote Position Overview: We are seeking a dynamic and highly motivated Fuel Handling Mechanical Design Engineer for a long-term c...
Date Posted: 05/26/2026 Recommended
-
Senior Structural Analyst
Bellevue, WA
Job Title: Senior Structural Analyst Location: Bellevue, WA Type: Contract Compensation: $54.00 - $90.00 per hour Contractor Work Model: Remote – offsite Hours: 40.0 Overview System One is seeking highly motivated and resourceful Senior Structural Anal...
Date Posted: 05/18/2026 Recommended
-
System Transients Analysis Engineer
Bellevue, Washington
Job Title: System Transients Analysis Engineer Location: Bellevue, WA Job Type: Contract Work Model: Hybrid/Onsite Preferred Overview System One is seeking a highly capable and motivated System Transients Analysis Engineer to support an advanced sodium...
Date Posted: 05/18/2026 Recommended
-
System Design Engineer
Bellevue, WA
Position Summary System One is seeking a System Design Engineer to support advanced nuclear reactor projects. This role focuses on system design, analysis, and supplier oversight, supporting complex fluid systems within a highly regulated environment. ...
Date Posted: 04/21/2026 Recommended
-
Component Engineer, Nuclear
Bellevue, WA
Job Title: Component Engineer, Nuclear Type: Contract Compensation: $52 - $85 hourly Contractor Work Model: Remote Position Overview: We are seeking an experienced and detail-oriented Component Engineer to support component design efforts in the nuclea...
Date Posted: 05/26/2026 Recommended
-
Core Thermal Hydraulics Engineer
Bellevue, WA
Job Title: Core Thermal Hydraulics Engineer Location: Bellevue, WA, United States Type: Contract Compensation: $69.00 - $115.00 per hour Contractor Work Model: Remote Hours: 40.0 hours per week Responsibilities Perform thermal-hydraulics analysis using...
Date Posted: 05/01/2026 Recommended
-
Senior Safety Methods Engineer
Bellevue, WA
Job Title: Senior Safety Methods Engineer Location: Bellevue, WA Type: Contract, 12 months Compensation: $37.00 - $74.00 Contractor Work Model: Onsite, remote available for exceptional non-local candidates. Overview: This role develops and qualifies sy...
Date Posted: 05/26/2026 Recommended
-
Thermal Analysis Engineer
Bellevue, WA
Job Title: Thermal Analysis Engineer Type: Contract (6 months) Compensation: $52 - $85 hourly Contractor Work Model: Fully Remote System One is seeking a highly motivated Thermal Analysis Engineer. Tasks Perform thermal model development and/or model m...
Date Posted: 04/28/2026 Recommended
-
Safety Analysis Engineer, Nuclear
Bellevue, WA
Job Title: Safety Analysis Engineer, Nuclear Location: Bellevue, WA Type: Contract, 12 months Contractor Work Model: Remote Overview This contract Safety Analysis Engineer role performs deterministic nuclear safety analysis and transient/accident model...
Date Posted: 05/26/2026 Recommended
-
System Design Engineer
Bellevue, WA
System One is seeking a System Design Engineer to support advanced nuclear reactor development. This role will support the Sodium Processing Systems team, focusing on system design, vendor coordination, and integration of hardware into overall plant sy...
Date Posted: 04/21/2026 Recommended
-
I&C Design Engineer
Bellevue, WA
Job Title: Design Engineer Type: Contract Compensation: $52 - $85 hourly Contractor Work Model: Remote Overview: We are seeking a talented and experienced Design Engineer specializing in Instrumentation and Control (I&C) for a contract opportunity with...
Date Posted: 05/26/2026 Recommended
-
Senior Safety Methods Engineer (Nuclear)
Bellevue, WA
Job Title: Senior Safety Methods Engineer Location: Bellevue, WA Type: Contract (yearlong) typically extends on a yearly basis Compensation: $69 - $115 hourly Contractor Work Model: Fully Remote Paid holidays and PTO System One is seeking a Senior Safe...
Date Posted: 05/20/2026 Recommended
-
Senior Nuclear Safety Analysis Engineer
Bellevue, WA
Job Title: Senior Nuclear Safety Analysis Engineer Location: Bellevue, WA Type: Contract (yearlong) typically extends on a yearly basis Compensation: $69-$115 hourly Contractor Work Model: Fully Remote Paid Holidays | PTO System One is seeking to contr...
Date Posted: 05/20/2026 Recommended
-
Requirements Management Engineer
Bellevue, WA
Job Title: Requirements Management Engineer Location: Bellevue, WA Type: Contract Compensation: $52.00 - $85.00 per hour Contractor Work Model: Remote Hours: 40.0 hours per week Overview System One is seeking to contract with a Requirements Management ...
Date Posted: 03/31/2026 Recommended
-
Construction Oversight Engineer
Bellevue, Washington
Job Title: Construction Oversight Engineer Location: Kemmerer, WY Job Type: Contract Work Model: Onsite Travel: Up to 75% Overview System One is seeking a highly experienced Construction Oversight Engineer to support a cutting-edge advanced nuclear ene...
Date Posted: 05/20/2026 Recommended
-
Plant Integrated Analysis Engineer
Bellevue, WA
Overview: System One is seeking a highly capable and motivated Plant Integrated Analysis Engineer to support advanced nuclear reactor development within a sodium-cooled reactor program. This role focuses on plant-level thermal-hydraulic and control sys...
Date Posted: 04/13/2026 Recommended
-
Lead Instrumentation & Controls (I&C) Design Engineer
Bellevue, WA
Job Title: Lead Instrumentation & Controls (I&C) Design Engineer Type: Contract Long term Compensation: $84.00 – $135.00/hour (DOE) Contractor Work Model: Remote – offsite Responsibilities Support advanced nuclear reactor technology projects involving ...
Date Posted: 05/11/2026 Recommended
-
Senior Mechanical Designer
Bellevue, Washington
Position Overview System One is seeking a highly motivated Senior Mechanical Designer to support the design and development of advanced Generation IV nuclear reactor systems. This role is responsible for creating structural and mechanical design soluti...
Date Posted: 05/05/2026 Recommended
-
Weld Engineer
Bellevue, WA
Weld Engineer (Contract) | Bellevue, WA (On-site) System One is seeking a highly motivated Weld Engineer to support a Materials Development & Qualification team advancing next-generation materials and components for sodium-cooled fast reactors. This is...
Date Posted: 05/06/2026 Recommended
-
Principal Engineer, Seismic CSA Integration and Oversight
Bellevue, WA
Job Title: Principal Engineer Seismic/CSA Integration & Oversight Type: Contract, 12 months Compensation: $69.00 - $115.00 per hour Contractor Work Model: Remote Responsibilities Support the development of plant level requirements and strategies relate...
Date Posted: 05/26/2026 Recommended
-
I&C V&V Design Engineer
Bellevue, WA
Job Title: I&C V&V Design Engineer Location: Bellevue, WA, United States Compensation: $67–$110/hr Contractor Work Model: Remote – offsite System One is seeking an experienced Instrumentation & Control (I&C) Verification & Validation (V&V) Engineer to ...
Date Posted: 05/19/2026 Recommended
-
System Design Engineer
Bellevue, WA
Job Title: System Design Engineer Location: Bellevue, WA Type: Contract Contractor Work Model: Remote – offsite Hours: 40.0 Security Clearance: Not specified Overview Responsibilities Design nuclear and industrial process systems and sub-systems from c...
Date Posted: 04/21/2026 Recommended