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Nuclear Design Engineer Jobs in Seattle, WA (NOW HIRING)

System One Holdings, LLC

Nuclear Methods Engineer

Bellevue, WA · On-site

$52 - $85/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

Nuclear Methods Engineer Location: Bellevue, WA Type: Contract Compensation: $52.00 - $85.00 Work ... Design and execute sensitivity studies to understand the effects and validity of various modeling ...

System One

Nuclear Methods Engineer

Bellevue, WA · Remote

$52 - $85/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

Nuclear Methods Engineer Location: Bellevue, WA Type: Contract Compensation: $52.00 - $85.00 Work ... Design and execute sensitivity studies to understand the effects and validity of various modeling ...

System One

Nuclear Methods Engineer

Bellevue, WA · Remote

$52 - $85/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

Nuclear Methods Engineer Location: Bellevue, WA Type: Contract Compensation: $52.00 - $85.00 Work ... Design and execute sensitivity studies to understand the effects and validity of various modeling ...

System One

Nuclear Methods Engineer

Bellevue, WA · Remote

$52 - $85/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

Nuclear Methods Engineer Location: Bellevue, WA Type: Contract Compensation: $52.00 - $85.00 Work ... Design and execute sensitivity studies to understand the effects and validity of various modeling ...

System One

System Design Engineer

Bellevue, WA · Remote

$102K - $140K/yr

Design nuclear and industrial process systems and subsystems from concept through final design ... Engineering Design Specifications (EDS) * Interface Control Documents (ICDs) * Support the ...

System One

System Design Engineer

Bellevue, WA · Remote

$102K - $140K/yr

Design nuclear and industrial process systems and subsystems from concept through final design ... Engineering Design Specifications (EDS) * Interface Control Documents (ICDs) * Support the ...

TerraPower LLC.

Nuclear Methods Engineer

Bellevue, WA · On-site

$111K - $133K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Nuclear Methods Engineer TerraPower, LLC. is seeking a highly motivated Nuclear Methods Engineer ... Design and execute sensitivity studies to understand the effects and validity of various modeling ...

TerraPower LLC.

Nuclear Methods Engineer

Bellevue, WA · On-site

$111K - $133K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Nuclear Methods Engineer TerraPower, LLC. is seeking a highly motivated Nuclear Methods Engineer ... Design and execute sensitivity studies to understand the effects and validity of various modeling ...

Protingent

Nuclear Methods Engineer

Bellevue, WA · On-site

$52 - $85/hr

  • Medical

  • Retirement

  • PTO

Nuclear Methods Engineer Position Description: Protingent Staffing has an exciting contract Nuclear ... Design and execute sensitivity studies to understand the effects and validity of various modeling ...

System One

System Design Engineer

Bellevue, WA · On-site

$110K - $151K/yr

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 ...

System One

System Design Engineer

Bellevue, WA · On-site

$110K - $151K/yr

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 ...

System One

Senior Mechanical Design Engineer

Bellevue, WA · Remote

$92K - $126K/yr

Collaborate with structural, thermal, nuclear, manufacturing, and systems engineering teams throughout the design process. * Perform engineering reviews of drawings, calculations, analyses, and ...

System One

System Design Engineer

Bellevue, WA · On-site

$110K - $151K/yr

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 ...

TerraPower LLC.

Senior Mechanical Design Engineer

Bellevue, WA · On-site

$101K - $140K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

TerraPower is a nuclear technology company based in Bellevue, Washington. At its core, the company ... Senior Mechanical Design Engineer In this role, you will create design solutions for the design ...

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All JobsNuclear Design Engineer JobsNuclear Design Engineer Jobs in Seattle, WA

Nuclear Design Engineer information

See Seattle, WA salary details

$70

$96

$115

How much do nuclear design engineer jobs pay per hour?

As of Aug 13, 2026, the average hourly pay for nuclear design engineer in Seattle, WA is $96.84, according to ZipRecruiter salary data. Most workers in this role earn between $94.09 and $106.68 per hour, depending on experience, location, and employer.

What is a nuclear design engineer?

A Nuclear Design Engineer is responsible for designing, analyzing, and optimizing nuclear systems, components, or reactors. They work on fuel assemblies, shielding, cooling systems, and safety mechanisms to ensure efficient and secure nuclear operations. Their role involves applying physics, engineering principles, and regulatory standards to develop safe and effective nuclear technology. These engineers collaborate with scientists, regulatory bodies, and project teams to ensure compliance and innovation in nuclear energy or research applications.

What are the key skills and qualifications needed to thrive as a nuclear design engineer?

To thrive as a Nuclear Design Engineer, you need a strong background in nuclear engineering, physics, and mathematics, typically supported by a relevant Bachelor's or Master's degree. Familiarity with industry-standard modeling software (such as MCNP or SCALE), CAD tools, and adherence to regulations like NRC or ASME codes are essential, and certifications such as a Professional Engineer (PE) license can be advantageous. Strong analytical thinking, teamwork, and effective communication skills set standout candidates apart in this field. These capabilities are vital for ensuring safe, efficient, and compliant nuclear system designs that meet rigorous industry and safety standards.

What are some typical challenges a nuclear design engineer may encounter on the job?

Nuclear Design Engineers often face complex technical challenges, such as optimizing reactor core configurations for safety and efficiency, adhering to strict regulatory requirements, and ensuring accurate modeling of nuclear systems. They may also need to troubleshoot unexpected design issues, interpret extensive technical data, and keep up with advancements in nuclear technology and safety protocols. Working closely with multidisciplinary teams—including mechanical, electrical, and safety engineers—requires strong collaboration and communication. Navigating these challenges not only sharpens problem-solving skills but also contributes significantly to both personal professional development and the overall safety and success of nuclear projects.

What are the most commonly searched types of Nuclear Design Engineer jobs in Seattle, WA? The most popular types of Nuclear Design Engineer jobs in Seattle, WA are:
What are popular job titles related to Nuclear Design Engineer jobs in Seattle, WA? For Nuclear Design Engineer jobs in Seattle, WA, the most frequently searched job titles are:
What job categories do people searching Nuclear Design Engineer jobs in Seattle, WA look for? The top searched job categories for Nuclear Design Engineer jobs in Seattle, WA are:
What cities near Seattle, WA are hiring for Nuclear Design Engineer jobs? Cities near Seattle, WA with the most Nuclear Design Engineer job openings:
Nuclear Design Engineer jobs near you
Infographic showing various Nuclear Design Engineer job openings in Seattle, WA as of August 2026, with employment types broken down into 1% Internship, 86% Full Time, 8% Part Time, and 5% Contract. Highlights an 86% Physical, 4% Hybrid, and 10% Remote job distribution, with an average salary of $201,427 per year, or $96.8 per hour.

Nuclear Methods Engineer

System One Holdings, LLC

Bellevue, WA • On-site

$52 - $85/hr

Contractor

Medical, Dental, Vision, Life, Retirement

This job post has expired today. Applications are no longer accepted.

Job description

Job Title: Nuclear Methods Engineer
Location: Bellevue, WA
Type: Contract
Compensation: $52.00 - $85.00
Work Model: Remote - offsite
Hours: 40.0
Overview
System One is seeking a highly motivated Nuclear Methods Software Engineer for a yearlong, fully remote contract position. In this role, you will support the nuclear methods team:
Responsibilities
  • Create formal documentation of nuclear methods software requirements, design, implementation, and testing in support of licensing our client's reactors
  • Update, improve, and/or create software to satisfy all licensing requirements during the Validation and Verification (V&V) process
  • Incorporate additional 3rd-party programs in our simulation ecosystem as necessary to support licensing
  • Design and execute sensitivity studies to understand the effects and validity of various modeling assumptions, including meshing, physics coupling, transport options, cross section preparation, fission product models, spatial kinetics, etc., and adjust methods as necessary
  • Train and support reactor designers and developers in the use of the design software suite
  • Build and apply methods to assess the propagation of uncertainty and their effect on safety margins
  • Enhance engineering team's ability to build models and make meaningful conclusions from simulation output through input tools, visualization, reports, etc.
Requirements
  • B.S. degree in Nuclear Engineering with 5-20 years of experience
  • M.S. degree in Nuclear Engineering with 3-15 years of experience
  • Ph.D. degree in Nuclear Engineering with 2-10 years of experience
  • Fast reactor physics and design intuition
  • Experience in nuclear design/analysis methodologies including criticality, flux/power distributions, fuel management optimization, reactivity coefficients, shielding, activation, control rod worth, detector response, and uncertainty analysis
  • Knowledge of reactor physics analysis methods (deterministic and stochastic particle transport, isotopic depletion, perturbation theory, nuclear data, kinetics, etc.)
  • Experience with nuclear engineering software such as DIF3D, MC2, PARTISN, MCNP, Serpent, SCALE, PARCS, APA, CASMO, DRAGON, ARMI, etc. preferred
  • Strong computational expertise and programming skills in scientific computing languages (Python, C++, Fortran bonus)
  • Proven ability to automate simulation tools and integrate software
  • Experience with software development tools (IDEs, version control, debuggers, documentation tools)
  • Knowledge of nuclear methodology interaction with the NRC under an ASME NQA-1 compliant QA environment preferred
  • Good understanding of numerical methods and applied mathematics (PDEs, stability, statistics, analysis, dynamics)
  • Strong technical documentation skills
  • Ability to meet aggressive schedules and deliver consistently
  • Self-motivated with a passion for software best practices and teamwork
  • Excellent verbal communication skills

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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