National Security Jobs

National Security

Protecting U.S. citizens through discovery and innovation

The National Security Sciences Directorate leads scientific and technological breakthroughs to confront some of the nation’s most difficult security challenges. We develop applications needed for the security of our nation today and target our vision on how these challenges may manifest themselves in a decade or more.

Our research and development focuses on cybersecurity and cyber physical resiliency, data analytics, geospatial science and technology, nuclear nonproliferation, and high-performance computing for sensitive national security missions. We also enhance ORNL contributions to national security challenges by working closely with leading researchers at the lab in areas such as nuclear and chemical sciences and engineering, applied materials, advanced manufacturing, biosecurity, transportation, and computing.

 

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National Security

Protecting U.S. citizens through discovery and innovation

ORNL’s strengths in advanced materials, nuclear science, and supercomputing are addressing complex national security challenges in the areas of nuclear nonproliferation, national defense, homeland protection, and intelligence.

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Postdoctoral Research Associate - Geothermal Energy Techno-Economic Analysis for Roadmap Extension Knoxville, TN, US, 37932 Oct 22, 2025
Stable Isotope Gas Centrifuge R&D Manager
Stable Isotope Gas Centrifuge R&D Manager Oak Ridge, TN, US, 37830 Oct 22, 2025 0.00 mi
Oak Ridge, TN, US, 37830 Oct 22, 2025
Stable Isotope Research Technician
Stable Isotope Research Technician Oak Ridge, TN, US, 37830 Oct 22, 2025 0.00 mi
Oak Ridge, TN, US, 37830 Oct 22, 2025
Information Systems Security Officer
Information Systems Security Officer Oak Ridge, TN, US, 37830 Oct 22, 2025 0.00 mi
Oak Ridge, TN, US, 37830 Oct 22, 2025
Electrical, Instrumentation, and Controls Engineer
Electrical, Instrumentation, and Controls Engineer Oak Ridge, TN, US, 37830 Oct 22, 2025 0.00 mi
Oak Ridge, TN, US, 37830 Oct 22, 2025
Nuclear Fuel Cycle Chemical Engineer
Nuclear Fuel Cycle Chemical Engineer Oak Ridge, TN, US, 37830 Oct 22, 2025 0.00 mi
Oak Ridge, TN, US, 37830 Oct 22, 2025
Mechanical Designer
Mechanical Designer Oak Ridge, TN, US, 37830 Oct 22, 2025 0.00 mi
Oak Ridge, TN, US, 37830 Oct 22, 2025
Alston S. Householder Fellowship: Mathematics and Scientific Computing
Alston S. Householder Fellowship: Mathematics and Scientific Computing Oak Ridge, TN, US, 37830 Oct 22, 2025 0.00 mi
Oak Ridge, TN, US, 37830 Oct 22, 2025
Postdoctoral Research Associate - Federated Learning
Postdoctoral Research Associate - Federated Learning Oak Ridge, TN, US, 37830 Oct 22, 2025 0.00 mi
Oak Ridge, TN, US, 37830 Oct 22, 2025
Group Lead, Neutron Systems Engineering
Group Lead, Neutron Systems Engineering Oak Ridge, TN, US, 37830 Oct 21, 2025 0.00 mi
Oak Ridge, TN, US, 37830 Oct 21, 2025

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Oak Ridge National Laboratory is managed by UT-Battelle for the Department of Energy.

ORNL is an equal opportunity employer; learn more. All qualified candidates, including individuals with disabilities and protected veterans, are encouraged to apply. ORNL is an E-Verify employer; learn more. If you have difficulty using the online application system or need accommodation to apply due to a disability, please email: ORNLRecruiting@ornl.gov.