Federal
- Department of Agriculture – U.S. Forest Service
- Department of Commerce (DOC) – National Oceanic and Atmospheric Administration (NOAA), National Weather Service (NWS)
- Department of Defense (DoD) – Office of the Secretary of Defense (OSD), Uniformed University of the Health Sciences (USUHS)
- Department of Health and Human Services (HHS) – National Institutes of Health (NIH)
- Department of Homeland Security (DHS) – Multiple agencies
- Department of the Interior – U.S. Fish and Wildlife Service (FWS)
- Department of Justice (DOJ)- Federal Bureau of Investigation, U.S. Attorneys Offices
- Department of Treasury
- Federal Home Loan Mortgage Corporation (Freddie Mac)
- General Services Administration (GSA)
- Multiple Federal intelligence and law enforcement agencies
- National Aeronautics and Space Administration (NASA) – Goddard Space Flight Center (GSFC)
- U.S. Air Force
- U.S. Army – Army Materiel Command (AMC), CECOM Life Cycle Management Command, Medical Department (AMEDD), Medical Research and Materiel Command (MRMC), Human Resources Command (HRC), Florida Army National Guard
- U.S. Navy – Naval Surface Warfare Center (NSWC), Office of Naval Research (ONR)
State and Local
- Commonwealth of Virginia
- George Mason University (GMU)
- Virginia Small Business Development Center Network (VA SBDC Network)
Commercial
- AT&T
- Bureau of National Affairs (BNA)
- IBM
- MCI Worldcom
- Sprint/Nextel
- The Weather Channel
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