Nuclear Shielding and Criticality Engineer

Protingent; Bellevue (WA); On-site; USD 95,000 - 158,000; Part time

Benefits offered by this job

Competitive salaries

Insurance plan options (HDHP/POS)

Education/cert reimbursement

Pre-tax commuter benefits

PTO

Administered 401k

Job summary

Protingent Staffing has an exciting contract Nuclear Shielding and Criticality Engineer opportunity based in Bellevue, WA, with an option for 100% remote work. The role emphasizes MCNP calculations and formal documentation within a regulated quality framework.

Ideal candidates hold advanced degrees in Nuclear Engineering and have strong experience with shielding analyses, variance reduction, and related CAD/FEA tools; domestic travel is minimal and compliance with export controls is required.

Qualifications

• Bachelor of Science in Nuclear Engineering with 10+ years of experience
• Master of Science in Nuclear Engineering with 6+ years of experience
• Ph.D. in Nuclear Engineering with 3+ years of experience
• Strong MCNP skills and radiation shielding calculations for gammas and neutrons required; criticality safety desired

Responsibilities

• Perform MCNP calculations and document results in formal calculation packages

Skills

MCNP

Radiation shielding

Criticality safety

Variance reduction

Python

Education

BS Nuclear Engineering

MS Nuclear Engineering

PhD Nuclear Engineering

Tools

MCNP tooling

Attila/Attila4MC

SolidWorks/ANSYS/Cubit

ADVANTG

Job description

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:

• Competitive salaries


• Insurance plan options (HDHP plan or POS plan)


• Education/certification reimbursement


• Pre-tax commuter benefits


• Paid Time Off (PTO)


• Administered 401k plan

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.

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