- American Red Cross
- City of Fairfax Office of Emergency Management
- City of Fairfax Fire
- Colonial Pipeline
- DHS
- Environmental Quality Advisory Council
- Fairfax County Board of Supervisors
- Fairfax County Department of Emergency Management and Security
- Fairfax County Department of Public Safety Communications
- Fairfax County Department of Public Works and Environmental Services
- Fairfax County Fire & Rescue
- Fairfax County Health Department
- Fairfax County Office of Public Affairs
- Fairfax County Police
- Fairfax County Public Schools
- Fairfax/Falls Church Community Service Board
- Fort Belvoir
- George Mason University
- INOVA Health Systems – Fairfax
- League of Women Voters of the Fairfax Area
- Mount Vernon Council of Citizens Association
- Miller Environmental
- NGA
- Northern VA Mental Health Institute
- Office of the Sheriff
- Science Applications International Corporation
- SICPA Securink, Inc.
- Town of Herndon Police
- Town of Vienna Police
- United States Coast Guard
- United States Geological Survey
- Upper Occoquan Sewage Authority
- Virginia Department of Emergency Management
- Virginia Department of Environmental Quality
- Virginia Department of Health
- Virginia Department of Transportation
- Virginia State Police
- Washington Gas
- U.S. Department of Transportation