Nuclear Shielding Engineer

Nuclear Mid-level (L4 equivalent) 2-5 years

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GE Vernova

Westinghouse

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The job description

Tech stack. MCNP and MAVRIC shielding codes, point kernel methods, 10 CFR 20 dose limits, ALARA design principles, streaming and skyshine analysis, CAD for shield modeling, Python automation

About the role

You will design the barriers between radiation and people for a nuclear utility or architect-engineer firm, calculating the shielding that keeps every area of the plant within dose limits. The team evaluates new designs, verifies existing shielding, and resolves streaming paths that models miss. You will build transport models, optimize shield thicknesses, and support construction with practical guidance. This role matters because shielding is invisible when it works and catastrophic when it does not, and your calculations are what workers trust with their long-term health. You will also perform shielding verifications during construction, confirming that as-built conditions match your models. Your ALARA design reviews will challenge project teams to reduce doses during the design phase when changes are cheapest. You will develop the shielding basis documents that future engineers rely on, clearly recording every assumption. Your streaming analyses will find the paths that bulk shielding calculations miss, because radiation exploits every gap.

What you will achieve

Deliver shielding designs meeting all dose rate targets with optimized material usage and cost.
Verify existing plant shielding through measurements and analysis, resolving any areas exceeding limits.
Complete streaming and skyshine analyses for penetrations and openings that simpler methods miss.
Support construction with shielding installation guidance preventing costly rework from design errors.
Automate routine shielding calculations reducing analysis time 40 percent across the team.

What you will bring

Must-haves

2 to 5 years in shielding analysis, radiation transport, or health physics engineering roles.
Proficiency with Monte Carlo shielding codes such as MCNP or MAVRIC including variance reduction.
Understanding of radiation transport physics: attenuation, buildup, scattering, and streaming.
Knowledge of 10 CFR 20 dose limits and ALARA principles applied to shield design.
Ability to build accurate geometric models from plant drawings and design documents.
Experience validating calculations against measurements with honest uncertainty assessment.
Practical judgment balancing conservatism against construction cost and feasibility.

Nice-to-haves

Experience with deterministic transport codes such as DORT or TORT.
Familiarity with skyshine and direct shine analysis methods.
Knowledge of shielding for medical or research reactor facilities.
Experience supporting NRC review of shielding analyses.