Nuclear Shielding and Criticality Engineer

Position Title: Nuclear Shielding and Criticality Engineer Position Description: Protingent Staffing has an exciting contract Nuclear Shielding and Criticality Engineer opportunity. Job Responsibilities: Tasks are generally MCNP calculations formally documented in calculation packages. Job Qualifications: B.S. degree in Nuclear Engineering with 10+ years’ experience M.S. degree in Nuclear Engineering with 6+ years’ experience Ph.D. degree in Nuclear Engineering with 3+ years’ experience Strong MCNP skills and experience with performing radiation shielding calculations for both gammas and neutrons are required.  Experience in criticality safety desirable. Candidate should be familiar with variance reduction using MCNP, and features such as surface source read/write, mesh tallies, and weight windows.  Familiarity with ADVANTG for weight windows generation is a plus. Excellent written and verbal and communication skills required.  Ability and professionalism to work within published regulatory guidelines required. Experience working under NQA-1 quality program desired. Strong computational expertise desired. Experience with Attila /Attila4MC and computed aided drafting (e.g., SolidWorks, SpaceClaim/ANSYS, Cubit) is a plus. Fast reactor experience a plus. Strong programming skills in any language is a plus, and Python is commonly used in this position. Knowledgeable or highly motivated to quickly learn basic nuclear reactor design concepts to meaningfully support engineering team. Actual position starting level will be determined based on assessment of qualifications. Travel Required: No travel required, 2 trips to home office/year recommended. Job Details: Job Type: Contract Pay Rate Range: $69-$115/hr (Pay rates are approved based on candidate location, education and experience) Location: Bellevue, WA or 100% Remote Export control regulations require candidates to be a U.S. Citizen, U.S. Legal Permanent Resident, or of a protected person status Benefits Package: Protingent offers competitive salaries, insurance plan options (HDHP plan or POS plan), education/certification reimbursement, pre-tax commuter benefits, Paid Time Off (PTO), and an administered 401k plan. #TerraPro About Protingent: Protingent is an Award-Winning provider of top-tier Engineering and IT talent, trusted by companies at the forefront of innovation — from Software and Aerospace to AI, Clean Tech, Medical Devices, and Connected Technologies. We’re passionate about making a positive impact by connecting exceptional talent with meaningful opportunities and helping our clients build the future.