Probabilistic Risk Assessment Engineer

System One; Washington (District of Columbia); On-site; USD 120,000 - 170,000; Full time

Benefits offered by this job

Health and welfare benefits coverage (

401(k) plan

Job summary

System One is seeking a Probabilistic Risk Assessment Engineer in Bellevue, WA. The role focuses on PRA for reactor design, including fault trees, event trees, and radiological models, with a strong emphasis on regulatory compliance and cross-disciplinary collaboration.

You will develop and maintain PRA analyses, support licensing efforts, and communicate results to regulators and management, leveraging CAFTA, FRANX, SAPHIRE and related tools.

Qualifications

• BS or MS in a relevant engineering discipline.
• 5+ years of Probabilistic Risk Assessment experience.
• Knowledge of PRA principles and ASME/ANS Non-Light Water PRA.
• Experience with PRA software CAFTA, FRANX, SAPHIRE or similar.
• Experience with assessment codes such as GOTHIC, MELCOR, RADTRAD a plus.
• Strong technical writing and communication skills.

Responsibilities

• Perform PRA and severe accident analysis for reactor design to regulatory standards.
• Develop PRA models including fault/event trees and radiological transport.
• Coordinate PRA with deterministic safety analysis and other disciplines.
• Provide guidance on reliability, risk metrics, and regulatory compliance to teams.
• Participate in PRA peer reviews, hazard analysis and PIRT exercises.
• Document PRA models and analysis results for regulators and internal reviews.
• Deliver presentations on PRA methods and results to management and customers.
• Utilize PRA software to perform risk assessments and interpret results.

Skills

Probabilistic risk assessment

Technical writing

Interdisciplinary teamwork

Regulatory compliance

Risk metrics & importance measures

Education

B.S. or M.S. in nuclear engineering

Mechanical / Electrical / Aerospace engineering

Tools

CAFTA

FRANX

SAPHIRE

GOTHIC

MELCOR

RADTRAD

Job description

Job Title

Probabilistic Risk Assessment Engineer

Location

Bellevue, WA

Type

Long-term Contract

Responsibilities

• Perform Probabilistic Risk Assessment (PRA) and severe accident analysis for the reactor design, ensuring compliance with regulatory standards and internal safety protocols.
• Contribute to the development of PRA models, including fault trees, event trees, and radiological transport models.
• Coordinate PRA work with deterministic safety analysis and other engineering disciplines to support reactor design and licensing efforts.
• Provide technical guidance on reliability, risk metrics, importance measures, and regulatory compliance to engineering teams and management.
• Participate in PRA peer reviews, hazard analysis, and Phenomena Identification and Ranking Table (PIRT) exercises.
• Develop and maintain documentation of PRA models, analysis results, and technical reports for regulators and internal review.
• Deliver presentations on PRA methods and results to internal management, customers, and regulatory bodies.
• Utilize PRA software such as CAFTA, FRANX, and other tools to perform risk assessments and interpret results.

Requirements

• B.S., or M.S. in nuclear, mechanical, electrical, or aerospace engineering (or similar).
• Five or more years of experience in Probabilistic Risk Assessment.
• Knowledge of PRA principles and familiarity with the ASME/ANS Non-Light Water PRA standard.
• Experience with PRA software such as CAFTA, FRANX, SAPHIRE, or similar tools.
• Experience with assessment codes like GOTHIC, MELCOR, RADTRAD is a plus.
• Strong technical writing and communication skills.
• Experience with sodium-cooled reactors or advanced reactor technologies preferred.
• Fluent in spoken and written English.
• Ability to work effectively in an interdisciplinary team and adhere to safety standards.

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.

Equal Opportunity Employer

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.