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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Radioisotope Production Technical Professional
Radioisotope Production Technical Professional Oak Ridge, TN, US, 37830 Feb 22, 2026 0.00 mi
Oak Ridge, TN, US, 37830 Feb 22, 2026
Postdoctoral Research Associate - Computational Methods for Data Reduction Oak Ridge, TN, US, 37830 Feb 22, 2026
Postdoctoral Research Associate - Computational Fluid Dynamics
Postdoctoral Research Associate - Computational Fluid Dynamics Oak Ridge, TN, US, 37830 Feb 22, 2026 0.00 mi
Oak Ridge, TN, US, 37830 Feb 22, 2026
Postdoctoral Research Associate - Computational Methods for Kinetic Equations Oak Ridge, TN, US, 37830 Feb 22, 2026
IC Classified Computing, Group Leader
IC Classified Computing, Group Leader Oak Ridge, TN, US, 37830 Feb 21, 2026 0.00 mi
Oak Ridge, TN, US, 37830 Feb 21, 2026
Lead, Instrumentation & Controls Engineer (Hybrid Eligible)
Lead, Instrumentation & Controls Engineer (Hybrid Eligible) Oak Ridge, TN, US, 37830 Feb 21, 2026 0.00 mi
Oak Ridge, TN, US, 37830 Feb 21, 2026
Grid Sensors R&D Engineer
Grid Sensors R&D Engineer Oak Ridge, TN, US, 37830 Feb 21, 2026 0.00 mi
Oak Ridge, TN, US, 37830 Feb 21, 2026
Postdoctoral Research Associate - Environmental Scientist
Postdoctoral Research Associate - Environmental Scientist Oak Ridge, TN, US, 37830 Feb 21, 2026 0.00 mi
Oak Ridge, TN, US, 37830 Feb 21, 2026
Postdoctoral Research Associate - Theory and Modeling of Dynamics in Condensed Matter Oak Ridge, TN, US, 37830 Feb 20, 2026
Postdoctoral Research Associate, Data Readiness
Postdoctoral Research Associate, Data Readiness Oak Ridge, TN, US, 37830 Feb 20, 2026 0.00 mi
Oak Ridge, TN, US, 37830 Feb 20, 2026

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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.