Nuclear Design and Shielding Engineer (Remote)

System One Holdings, LLC • Full-time • Bellevue, Washington, United States • 2d ago

System One is seeking a highly motivated Nuclear Design and Shielding Engineer for a long-term, fully remote contract.

In this role, you will:

Perform radiation shielding design and analysis for advanced nuclear reactors and medical isotope separation facilities, calculating dose, activation rates, half-thicknesses, DPA rates, energy deposition rates, and gas production rates.
Develop radiation source terms based on materials activation analysis for non-fuel in-vessel components.
Design and analyze new systems to solve complex engineering challenges.
Conduct sensitivity studies to evaluate the effects of modeling assumptions, including model geometry complexity, meshing, variance reduction techniques, transport options, and cross-section preparation. Modify methods as needed.
Establish and maintain documentation of analysis results and radiation shielding design solutions.

Key Qualifications and Skills:

B.S. degree in Nuclear Engineering or equivalent experience with 5+ years of related experience; an advanced degree and 5+ years of nuclear analysis experience preferred.
Knowledgeable or motivated to quickly learn nuclear reactor design concepts and support the engineering team.
Experience in core and/or radiation shielding design and analysis.
Criticality safety experience.
Strong computational expertise with a passion for using computers to solve complex problems.
Familiarity with radiation shielding software such as Attila, MCNP, ADVANTG, Serpent, MAVRIC, MicroShield, ORIGEN, SCALE, OpenMC, Whisper, PARTISN, etc.
Experience with depletion software like ORIGEN.
Familiarity with nuclear core analysis software like ARMI, DIF3D, MC2, DRAGON, etc.
Experience with CAD software (SolidWorks, Space Claim/ANSYS, Cubit).
Knowledge of nuclear and numerical methods (activation analysis, dose rates, PDEs, dynamics, particle transport, isotopic depletion, nuclear data).
Strong verbal and communication skills.
Ability to work within regulatory guidelines for nuclear reactor design.
Fast reactor experience preferred.
Software development experience for nuclear applications is a plus.
Strong programming skills (Python, Git, C++, Fortran).
Experience in NQA-1 quality program environments is desired.
Maintain software by addressing enhancement requests and bug fixes with the team.
The successful candidate will demonstrate trust, integrity, professionalism, communication, and a commitment to fostering teamwork.