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Relap5 Jobs (NOW HIRING)

System One

Senior Safety Methods Engineer

Bellevue, WA · Remote

$37 - $74/hr

Experience with thermal hydraulic analysis tools such as RELAP5 3D, GOTHIC, SAS, or equivalent. * Proven experience in developing or improving analysis methods, including numerical schemes and ...

System One

Senior Safety Methods Engineer

Bellevue, WA · Remote

$37 - $74/hr

Experience with thermal hydraulic analysis tools such as RELAP5 3D, GOTHIC, SAS, or equivalent. * Proven experience in developing or improving analysis methods, including numerical schemes and ...

System One

Senior Safety Methods Engineer

Bellevue, WA · Remote

$37 - $74/hr

Experience with thermal hydraulic analysis tools such as RELAP5 3D, GOTHIC, SAS, or equivalent. * Proven experience in developing or improving analysis methods, including numerical schemes and ...

System One

Senior Safety Methods Engineer

Bellevue, WA · Remote

$37 - $74/hr

Experience with thermal hydraulic analysis tools such as RELAP5 3D, GOTHIC, SAS, or equivalent. * Proven experience in developing or improving analysis methods, including numerical schemes and ...

System One

Senior Safety Methods Engineer

Bellevue, WA · Remote

$37 - $74/hr

Experience with thermal hydraulic analysis tools such as RELAP5 3D, GOTHIC, SAS, or equivalent. * Proven experience in developing or improving analysis methods, including numerical schemes and ...

System One

Senior Safety Methods Engineer

Bellevue, WA · Remote

$37 - $74/hr

Experience with thermal hydraulic analysis tools such as RELAP5 3D, GOTHIC, SAS, or equivalent. * Proven experience in developing or improving analysis methods, including numerical schemes and ...

System One

Senior Safety Methods Engineer

Bellevue, WA · Remote

$37 - $74/hr

Experience with thermal hydraulic analysis tools such as RELAP5 3D, GOTHIC, SAS, or equivalent. * Proven experience in developing or improving analysis methods, including numerical schemes and ...

System One

Senior Safety Methods Engineer

Bellevue, WA · Remote

$37 - $74/hr

Experience with thermal hydraulic analysis tools such as RELAP5 3D, GOTHIC, SAS, or equivalent. * Proven experience in developing or improving analysis methods, including numerical schemes and ...

System One

Senior Safety Methods Engineer

Bellevue, WA · Remote

$37 - $74/hr

Experience with thermal hydraulic analysis tools such as RELAP5 3D, GOTHIC, SAS, or equivalent. * Proven experience in developing or improving analysis methods, including numerical schemes and ...

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How much do relap5 jobs pay per hour?

As of Aug 20, 2026, the average hourly pay for relap5 in the United States is $50.17, according to ZipRecruiter salary data. Most workers in this role earn between $39.42 and $60.82 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a RELAP5 nuclear safety analyst?

To thrive as a RELAP5 Nuclear Safety Analyst, you need a solid background in nuclear engineering, thermohydraulics, and reactor safety analysis, usually supported by an engineering degree. Proficiency in using the RELAP5 simulation software, understanding of nuclear regulatory codes, and familiarity with data analysis tools are essential technical requirements. Strong analytical thinking, attention to detail, and effective communication skills help you interpret complex data and collaborate with multidisciplinary teams. These capabilities are vital to ensure accurate safety assessments and compliance with regulatory standards in nuclear power plant operations.

What is the difference between Relap5 vs Relap5?

AspectRelap5Relap5

Since the comparison is between the same job title, there is no difference in skills, credentials, or work environment. Both roles involve using Relap5 software for thermal-hydraulic safety analysis in nuclear engineering, requiring similar certifications and industry experience. Typically, professionals in this role work in nuclear power plants, research facilities, or engineering firms focused on nuclear safety. The primary distinction may lie in specific project focus or experience level, but overall, the roles are equivalent.

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Relap5 jobs near you
Infographic showing various Relap5 job openings in the United States as of August 2026, with employment types broken down into 79% Full Time, and 21% Contract. Highlights an 90% Physical, and 10% Remote job distribution, with an average salary of $104,344 per year, or $50.2 per hour.

Senior Safety Verification and Validation Engineer

System One Holdings, LLC

Bellevue, WA • On-site

$72 - $90/hr

Full-time

Medical, Dental, Vision, Life, Retirement

Re-posted 8 days ago

Job description

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 software integral to reactor safety analysis and licensing. You will work on developing and assessing benchmark models, ensuring compliance with NRC guidance (RG 1.203), and supporting safety methodology development for next-generation nuclear systems, including Sodium Fast Reactors (SFR).
Key Responsibilities:
  • Develop and maintain assessment bases, including benchmarks and applicable tests, to support safety evaluations.
  • Identify uncertainties within experimental data and develop robust benchmark models.
  • Assess evaluation models (EM) using NRC's RG 1.203 guidance, ensuring safety standards are met.
  • Coordinate and execute safety code verification and validation activities, including simulations, Benchmarking with Integral Effect Tests (IETs), and Separate Effect Tests (SETs).
  • Support scaling analyses, code applicability determinations, and software commercial-grade dedication.
  • Contribute to the development of analytical and computational models, integrating them into transient analysis codes in collaboration with safety analysis teams.
  • Review engineering analyses and contribute to safety assessments for licensing documentation.
  • Collaborate with interdisciplinary teams to establish safety, performance, and quality requirements for core and reactor systems.
  • Support code development, maintenance, and performance evaluation for system transient codes and safety analyses

Qualifications & Skills:
  • Extensive experience with nuclear safety software verification, validation, and system transient analysis codes (RELAP5-3D, TRACE, MELCOR, SAS4A/SASSYS-1, SAM, or similar).
  • Strong understanding of nuclear thermal-hydraulic fundamentals, reactor dynamics, and transient phenomena.
  • Proven expertise with safety analysis methodologies, including experience with NRC RG 1.203.
  • Familiarity with EMDAP and regulatory requirements specific to nuclear safety.
  • Knowledge of SFR safety methods and experience with other reactor types such as LWRs is highly desirable.
  • Proficiency in programming languages such as Fortran, C++, or Python is a strong plus.
  • Advanced degree in nuclear engineering or related field, with at least 5 years of relevant experience.
  • Demonstrated strong analytical, modeling, and report-writing abilities.
  • Experience working within NQA-1 quality assurance programs and multidisciplinary engineering teams.
  • Exceptional communication skills, high integrity, and a collaborative mindset.

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.
Ref: #161-Managed Staffing Charlotte
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About System One

Sourced by ZipRecruiter

System One helps employers get work done more efficiently and economically without compromising quality. Over our 35+ year history, we've helped connect thousands of talented people with innovative companies. The excitement of a perfect fit motivates us every single day.

Industry

Business consulting services and recruiting and staffing services

Company size

5,001 - 10,000 Employees

Headquarters location

Pittsburgh, PA, US

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