System Transients Analysis Engineer
Bellevue, Washington
Experience: 0
Category: Energy
Contractor Work Model: Remote
Brand: System One
Compensation Range: 67.00 - 110.00 Per Hour
Job ID: 350994
Date Posted: 05/18/2026
Shortcut: http://jobs.systemone.com/UlNgkt
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-cooled reactor program. This role will focus on thermal hydraulic and transient analysis activities supporting advanced reactor system design, plant operations analysis, and control system integration.
The ideal candidate will have strong experience with system analysis codes such as RELAP5 or TRACE, along with a strong foundation in thermal hydraulics, heat transfer, fluid dynamics, and nuclear plant transient analysis.
Responsibilities
- Develop RELAP5-3D models for steady-state and transient one-dimensional hydraulic network analyses
- Perform reactor and plant transient analyses for normal operations, upset conditions, emergency events, and faulted scenarios
- Develop plant-level control strategies and component-level controllers
- Perform calculations using first principles of heat transfer, thermodynamics, and fluid dynamics to validate analytical results
- Support evaluation of plant-wide transients, operational narratives, and design solutions
- Perform multiscale and multidisciplinary thermal hydraulic analyses involving sodium, molten salt, and non-condensable fluids
- Collaborate closely with safety, I&C, design engineering, and testing teams
- Support development of new analytical methods and advanced modeling techniques
- Prepare technical reports, calculations, and engineering documentation
Required Qualifications
- Bachelor’s degree or higher in Nuclear Engineering, Mechanical Engineering, Electrical Engineering, or related discipline
- Strong experience with thermal hydraulic system codes such as RELAP5 and/or TRACE
- Strong analytical background in:
- Thermal hydraulics
- Fluid dynamics
- Heat transfer
- Transient analysis
- One-dimensional hydraulic network modeling
- Strong technical writing and communication skills
- Ability to work effectively in a collaborative, fast-paced engineering environment
- High level of professionalism, integrity, and teamwork
Preferred Qualifications
- Experience with ASME component design and analysis
- Experience modeling control systems and Instrumentation & Controls (I&C)
- Experience supporting nuclear power plant design or operations
- Experience developing new analytical methods
- Advanced reactor or sodium-cooled reactor experience
Physical & Work Environment Requirements
- Ability to sit and/or stand for extended periods
- Minimal lifting requirements up to 25 pounds
- Prolonged computer and keyboard work
- Standard office or engineering work environment
- Occasional travel up to 5%
Additional Information
This position may require compliance with U.S. export control regulations. Applicants may be asked to provide information regarding citizenship or work authorization status as part of the hiring process.
Ref: #161-Managed Staffing Charlotte
-
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
-
Senior Safety Verification and Validation Engineer
Bellevue, Washington
Job Title: Senior Safety Verification and Validation Engineer Type: Contract (12-months) Contractor Work Model: Remote About the Role: As a Senior Safety V&V Engineer, you will be instrumental in verifying and validating safety assessment models and so...
Date Posted: 03/09/2026 Recommended
-
Computational Thermal Hydraulics Analyst
Bellevue, WA
Job Title: Computational Thermal Hydraulics Analyst Type: Contract Compensation: $84.00 - $110.00 per hour Work Model: Remote Overview System One is seeking a Computational Thermal Hydraulics Analyst for a remote contract. The ideal candidate will brin...
Date Posted: 05/07/2026 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
-
Code Validation Experiment Design and Scaling Analysis
Bellevue, WA
Job Title: Code Validation Experiment Design and Scaling Analysis Type: Contract Overview System One is seeking a Code Validation Experiment Design and Scaling Analysis Consultant to support one of our clients’ nuclear programs, focused on verification...
Date Posted: 05/07/2026 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: 05/09/2026 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
-
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
-
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
-
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
-
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
-
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
-
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
-
Nuclear Engineer V, Mechanical
Perry, Ohio
Job Title: Nuclear Engineer V – Mechanical Type: Long-Term Contract Pay Rate: $115.00/hour Per Diem: $178/day Location: Nuclear facilities in Ohio Work Model: Remote then Onsite Perry Plant – Perry, OH Davis-Besse Plant – Oak Harbor, OH Beaver Valley P...
Date Posted: 05/05/2026 Recommended
-
Nuclear Engineer V, Electrical
perry, Ohio
Job Title: Nuclear Engineer V – Electrical Location: Perry Plant – Perry, OH Davis-Besse Plant – Oak Harbor, OH Beaver Valley Plant – Hookstown, PA Position Type: Contract (12 Months) Schedule: Monday–Friday | 8:00 AM – 5:00 PM Pay Rate: $115/hr (DOE) ...
Date Posted: 03/18/2026 Recommended
-
Nuclear Mechanical/Structural Analysis
Cranberry, PA
Job Description: Senior Nuclear Mechanical / Structural Analysis Engineer (Reactor Internals) Length of the assignments: 6 months to 2 years Position Summary The Senior Nuclear Mechanical/Structural Analysis Engineer is responsible for performing advan...
Date Posted: 05/06/2026 Recommended
-
Refueling & Remote Handling Engineer 4
Corvallis, OR
Job Title: Refueling & Remote Handling Engineer 4 Type: Direct Hire Work Model: Remote (travel to client sites as needed) Overview Step into a fully remote, direct-hire opportunity as a Refueling & Remote Handling Engineer (Level 4) supporting advanced...
Date Posted: 05/07/2026 Recommended
-
Sr. Metallurgist Process Engineer
Austintown, Ohio
Job Title: Sr. Metallurgist Process Engineer Location: Austintown, Ohio Type: Contract Compensation: 120-130K Contractor Work Model: Onsite – onsite Hours: 40.0 Responsibilities Direct and oversee casting and metallurgical programs to enhance operation...
Date Posted: 03/20/2026 Recommended
-
Senior Fuel Handling System Design Engineer, Nuclear
Bellevue, WA
Job Title: Senior Fuel Handling System Design Engineer, Nuclear Location: Bellevue, WA Type: Contract Compensation: $69.00 - $115.00 per hour Contractor Work Model: Remote – offsite Responsibilities Design of nuclear fuel handling systems and fuel hand...
Date Posted: 05/15/2026 Recommended
-
Component Engineer, Nuclear
Burlington, Vermont
Job Title: Component Engineer, Nuclear Location: Burlington, VT Type: Contract, 12 months Compensation: $69.00 - $115.00 per hour Contractor Work Model: Hybrid, 3-4 days a week on site. Responsibilities: Interface with suppliers on the development of P...
Date Posted: 05/09/2026 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
-
Structural - Project Engineer
Alexandria, Virginia
Structural Project Engineer Alexandria, VA | Full-Time | Hybrid Work Schedule Available Are you a creative and detail-oriented engineer who enjoys solving complex design challenges? We’re looking for a Structural Project Engineer to join a dynamic, emp...
Date Posted: 05/05/2026 Recommended
-
Project Engineer
Okmulgee, Oklahoma
Project Engineer Eligibility: Must be a U.S. Citizen and not require sponsorship Position Summary System One is working with a client seeking a results-driven Project Engineer to lead and support capital projects from concept through execution. This ro...
Date Posted: 05/12/2026 Recommended
-
Supplier Manufacturing Engineer
Cheswick, PA
System One is seeking a Supplier Manufacturing Engineer to support critical supplier performance and manufacturing execution. This role is highly hands-on and focused on improving supplier processes, resolving manufacturing challenges, and driving on-t...
Date Posted: 03/26/2026 Recommended
-
Mechanical Designer
Bellevue, WA
Job Title: Mechanical Designer Location: Bellevue, WA Type: Contract Compensation: $37.00 - $74.00 per hour Contractor Work Model: Hybrid – onsite and remote Hours: 40.0 hours/week Responsibilities Develop 3D CAD models and detailed engineering drawing...
Date Posted: 05/04/2026 Recommended
-
DCN Structural Engineer
Houston, Texas
Job Title: DCN Structural Engineer Location: Houston, Texas Type: Direct Hire Compensation: $90,000.00 - $135,000.00 Contractor Work Model: Hybrid – onsite and remote About the Company Our client is a global engineering and technology organization focu...
Date Posted: 05/20/2026 Recommended
-
Mechanical Design Engineer / Missile systems components
Grand Praire, Texas
Mechanical Design Engineer 12 Month contract Onsite Grand Prairie, TX Pay: $60-$70 per hour Clearance: Secret Clearance required Join a mission-critical Air Dominance production program where your engineering expertise directly contributes to the devel...
Date Posted: 05/13/2026 Recommended
-
DCN Mechanical /Piping Engineer
Houston, Texas
Job Title: DCN Mechanical /Piping Engineer Location: Houston, Texas Type: Full-time Compensation: $90,000.00 to $135,000.00 Contractor Work Model: Hybrid – onsite and remote Mechanical Equipment / Piping Engineer – Data Center Infrastructure Direct Hir...
Date Posted: 05/20/2026 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
-
Manufacturing Engineers
Cheswick, PA
Job Title: Manufacturing Engineers Company: System One Locations: Albany, NY | New York, NY | Philadelphia, PA Work Model Remote - Travel within 2-3 hours of your home base Position Type: Contract to Perm Position Overview System One is seeking a Suppl...
Date Posted: 04/29/2026 Recommended