Job Title: Senior Safety Methodology Engineer Location: Bellevue, WA Type: Contract Compensation: $67 - $110 hourly Contractor Work Model: Remote About This Opportunity System One is seeking to place a Senior Safety Methodology Engineer with our client, a leading organization in the nuclear energy sector. You will join the client’s methodology team to develop and defend Design Basis Accident (DBA) methods and support licensing efforts for advanced reactor systems. Responsibilities + Collaborate with the client’s application methodology lead to craft and refine modeling techniques used in DBA events + Prepare and document analytic methodology reports, defending assumptions, biases, and best estimate approaches + Conduct sensitivity studies using RELAP5, SAS, GOTHIC, or similar codes to validate methodology performance + Benchmark and validate codes per regulatory processes like EMDAP and NuReg 1.203 + Assist in modifying methodology studies to support reactor licensing and design efforts Required Qualifications + Educational background: B.S. (+10 years), M.S. (+7 years), or Ph.D. (+5 years) in nuclear, mechanical, or related engineering/science fields + Demonstrated experience with transient safety analysis, methodology development, and system modeling + Knowledge of Licensing Basis Events, DBA topical requirements, and Reg Guide 1.203 + Strong thermal hydraulic and transient system modeling skills + Experience with code validation & verification in nuclear safety applications + Excellent technical writing, communication, and ability to work collaboratively in multi disciplinary teams + Integrity, openness, and a commitment to high quality and professionalism Working Conditions & Physical Requirements + Extended periods of sitting/standing; occasional bending, gripping, fine motor tasks + Ability to safely handle up to 25 lbs + Repetitive work and visual/auditory focus tasks + Standard office environment, 8+ hours/day with minimal travel (0–5%) System One, and its subsidiaries including Joulé, ALTA IT Services, 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. #M- #LI- #DI- Ref: #161-Managed Staffing Charlotte System One, and its subsidiaries including Joulé, ALTA IT Services, CM Access, TPGS, and MOUNTAIN, LTD., are leaders in delivering workforce solutions and integrated services 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 full-time 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.