Organization | ORNL
Organization
Updated:
February 23, 2026
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Organization
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Working at ORNL
Oak Ridge National Laboratory
Organization overview (
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Laboratory Director's Office (
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Directorates
Science and Technology
Biological and Environmental Systems Science​s
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Computing and Computational Sciences
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Energy Science and Technology
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Fusion and Fission Energy and Science
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Isotope Science and Enrichment
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National Security Sciences
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Neutron Sciences
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Neutron Upgrades Project Office (
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Physical Sciences
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Exascale Computing Project
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US ITER Project
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Operations
Business Services (
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Communications and Community Engagement
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Counterintelligence (
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Environment, Safety, Health, and Quality (
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Facilities and Operations (
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Human Resources (
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Information Technology Services (
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Internal Audit (
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Legal (
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Divisions
Science and Technology
Biosciences
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Buildings and Transportation Science
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Center for Nanophase Materials Sciences
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Chemical Sciences
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Computational Sciences and Engineering
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Computer Science and Mathematics
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Cyber Resilience and Intelligence
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Electrical and Electronics Systems Research
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Electrification and Energy Infrastructure
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Enrichment Science and Engineering
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Environmental Sciences
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Field Intelligence Operations
Fusion Energy
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Geospatial Science and Human Security
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Isotope Processing and Manufacturing
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Manufacturing Science
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Materials Science and Technology
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National Center for Computational Sciences/Oak Ridge Leadership Computing Facility
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Neutron Scattering
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Neutron Technologies
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Nonreactor Nuclear Facilities
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Nuclear Energy and Fuel Cycle
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Nuclear Nonproliferation
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Office of Institutional Strategic Planning (
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Office of Research Education (
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Partnerships
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Physics
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Radioisotope Science and Technology
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Reactor and Nuclear Systems
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Research Accelerator
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Research Reactors
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The University of Tennessee Oak Ridge Innovation Institute
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Operations
Accounting Operations (
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Application Development (
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Business Operations (
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Contracts
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Creative Services (
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Cybersecurity (
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Digital Services Infrastructure and Operations (
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Engineering Management (
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)​
Environmental Protection Services (
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Executive Communications Office (
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External Communications Office (
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Fabrication, Instrumentation, and Inspection (
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Facilities Management (
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Health Services (
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Integrated Operations Support (
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Internal Communications Office (
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Laboratory Modernization (
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Laboratory Protection (
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Logistical Services (
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Nuclear Facility Safety (
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Nuclear and Radiological Protection (
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Office of Integrated Performance Management (
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Protocol and Community Engagement Office (
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Project Management Office (
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Project Management Office and Communications (
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Quality Assurance (
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Research Computing Support (
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Safety and Operations Services (
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Science and Technology Communications Office (
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Transportation and Waste Management (
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Utilities Division (
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