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.
...Summary National Power, LLC is seeking a Quality Assurance Manager to join our growing team!Under... ..., or approaches to problems. Work Conditions This position may be required... ...will require the employee to work from home. Equal Opportunity Employer: National...
...transformative possibilities of technology. Experience what's next at Avnet!**Job Summary:**Integrates and configures Personal Computing (PC) hardware and peripherals.**Principal Responsibilities:**+ Integrates and configures a variety of PC hardware, operating system...
...Center of Ravenna, Oh is now looking for a Full-time Dietary Aide that is willing to cross train... ...within 24-48 hours) What we offer: Full-time, Part-time Flexible schedules PTO starting Day 1! Daily Pay! Cross train as a Cook - extra $$ Monthly...
...Translating and localizing in-game text and other written materials from Chinese to French using personal experience and translation software2. Communicating with players in French-speaking regions, providing them guidance and gathering feedback3. Manage gameplay data...
...efficiently to locations across the country . This is a part-time, flexible, as-needed position , ideal for someone who enjoys... ...issues or maintenance needs What We Offer Competitive daily pay (including travel and event days) All travel expenses covered...