Location: Remote (U.S.-based)
Employment Type: Contract
Company: System One
System One is actively seeking a highly skilled and motivated Nuclear Shielding and Criticality Engineer for a remote contract position supporting advanced nuclear technology projects. This is an excellent opportunity for experienced engineers who thrive in autonomous, high-impact technical environments.
As a Nuclear Shielding and Criticality Engineer, you will be responsible for radiation transport and criticality safety analysis using MCNP 6.2 . The scope includes shielding calculations, energy deposition, neutron fluence, activation studies, and development of upper subcritical limits. You will support safety, licensing, and design efforts in accordance with high-quality nuclear standards, including NQA-1 .
Perform shielding and radiation transport analysis for advanced nuclear systems.
Calculate dose rates, activation rates, neutron fluence, and energy deposition.
Conduct material activation analyses to develop radiation sources.
Perform nuclear criticality safety evaluations and define Upper Subcritical Limits (USLs).
Maintain clear, traceable, and auditable documentation aligned with QA requirements.
Collaborate remotely with multidisciplinary teams and contribute to evolving technical needs.
B.S. in Nuclear Engineering with 5–20 years of experience, or
M.S. with 3–15 years, or Ph.D. with 2–10 years of experience.
Expert-level MCNP user with demonstrated radiation shielding analysis experience.
Proficient with MCNP variance reduction techniques (mesh tallies, weight windows, surface sources).
Strong communication and documentation skills.
Experience working within NQA-1 or equivalent QA frameworks.
Familiarity with ADVANTG for weight window generation.
Experience with criticality safety methods and regulations.
Exposure to fast reactor physics and design is a plus.
Familiarity with Attila/Attila4MC , CAD tools (e.g., SolidWorks, SpaceClaim/ANSYS, Cubit).
Programming experience in Python or other scientific languages.
Ability to quickly learn and apply nuclear design concepts in support of project goals.
...located in Avon, Ohio. They have been serving aerospace and other industries for over 30 years. The Mission of Cutting Dynamics is to... ...Who we are looking for We are looking for an Industrial Painter to join our growing team on 2nd Shift. As an Industrial Painter...
...necesidades. Aunque no somos parientes, creemos que te sentirs parte de nuestra familia. El Fondo de la Familia BK est ah para... ... Puede ser supervisado por el Subgerente y/o el Subgerente Senior Puede ser entrenado por el Gerente de Distrito Tenemos vacantes...
...Team Home Services is looking for a Seasonal Parts Runner / Shop Hand to support our field technicians and shop operations. This role... ...vehicles Assist with inventory tracking and stock replenishment Help load/unload materials for crews as needed Perform general shop...
...Over the Road Class A CDL Owner Operator Are you looking for a new Company that cares about you and your family? Looking to manage... ...Logistics is the place for you! Job Details: ~24/7/365 Personal Driver Manager. ~ You pick your home time. ~ You pick the lanes...
...Physician Primary Care Direct Hire Full-time Sign-on Bonus. Competitive Salary Excellent... ...highly qualified Family or Internal Medicine Physicians for community medicine... ...options for fishing, hiking, and winter sports, catering to all kinds of outdoor enthusiasts...