- Appalachian Trail Conservancy
- City of Harrisburg
- City of Harrisburg: Lead Paint Program
- Lackawanna County
- Lackawanna Heritage Valley Authority
- Northeast, South Central, North Central and South Central Mountain Counter Terrorism Task Forces (Pennsylvania)
- Pennsylvania Capitol Police
- Pennsylvania Department of Conservation and National Resources
- Pennsylvania Department of Environmental Protection
- Pennsylvania Department of General Services
- Pennsylvania Department of Health
- Pennsylvania Department of Military Affairs
- Pennsylvania Department of Transportation
- Pennsylvania Emergency Management Agency
- Pennsylvania Historical and Museum Commission
- Pennsylvania Liquor Control Board
- Pennsylvania Office of the Attorney General
- Steamtown: United States Postal Service
- The Senate of Pennsylvania
- U.S. National Park Service (Denver Service Center)
- U.S. Army: (Letterkenny Army Depot; Tobyhanna Army Depot; Ft. Dietrich, VA; Defense Distribution Region East (New Cumberland, PA); Ravenrock Facility; U.S. Army War College (Carlisle, PA))
- U.S. Army: Corps of Engineers
- U.S. Environmental Protection Agency
- U.S. Food & Drug Administration
- U.S. General Services Administration
- U.S. Navy: (Ships Parts Control Center (Mechanicsburg, PA); Merchant Marine Academy (Kings Point, NY))
- U.S. Prison System (Lewisburg, Canaan, Loretto)
- Abington Heights School District
- Cornell University
- Cumberland Valley School District
- East Pennsboro School District
- Gettysburg University
- Keystone College
- Marywood University
- Messiah College
- Misericordia University
- National Fire Protection Association
- Northeast PA College Consortium
- The Pennsylvania State University
- University of Scranton
- Wilkes University
- Acute Care Hospitals (various 75-125 locations)
- Allegheny County Health Department
- Allied Services
- Bradford/Susquehanna Emergency Medical Services Council
- Childhood Lead Poison Prevention Program, Pennsylvania
- Geisinger Healthcare Systems
- Holy Spirit Health System
- John Heinz Rehabilitation Institute
- Keller Army Hospital
- National Disaster Medical System, U.S. Department of Health and Human Services
- PA Department of Health: Office of Public Health Preparedness
- PA: Department of Public Welfare: Office of Mental Health & Substance Abuse
- Pennsylvania Emergency Health Services Federation
- Philadelphia Department of Health
- Sanofi Pasteur Aventis (Pharmaceuticals)
- South Central Pennsylvania Hospitals & Healthcare Facilities
- The Commonwealth Medical College
- University of Pittsburgh: Medical Centers
- University of Scranton: Institute of Molecular Biology & Medicine
- Virginia Medical Centers
- Wellspan Healthcare
- Armstrong Environmental Services
- BAE Systems
- Bayer Healthcare Corporation
- Blair Petroleum Maintenance & Construction
- BP Energy
- Buckeye Partners & Pipeline Company
- Captive Resources
- Cinram Manufacturing
- Donegal Insurance
- Encompass Insurance
- Excalibur Insurance Services
- General Dynamics
- General Mills
- HARIE (Housing and Redevelopment Insurance Exchange)
- Harley Davidson
- Hershey Foods
- Hilton Garden Inns
- IFS Industries (Worldwide)
- Jones & Barlett (Publishers)
- Kraft Foods
- Mallinckrodt Baker, Inc.
- Motiva Enterprises (Worldwide)
- Nestle Purina Company
- Nittany Engineering and Associates, LLC.
- Petroleum Products Corporation
- Procter & Gamble Paper Products
- Sandvik Materials Technology
- Schaedler Yesco Distribution
- Sedgwick Claims Management
- Shindler Elevator Corporation
- Shott Glass: North America
- Sodexho Facilities Group
- SuperValu (various locations)
- Susquehanna Regional Airport Authority
- Texon, LP
- U. S. Steel
- Walmart Stores
- Woolf Steel
- Exelon: Nuclear
- Lycoming County Landfills
- Met Ed: (First Energy)
- Pennsylvania Power & Light (PPL)
- UGI: Penn Natural Gas
- Waste Management: Alliance Landfill
- Absolute Environmental Services
- Buchart-Horn
- Chesapeake Bay Solutions
- Clean Venture/Cycle Chem (New Jersey)
- Damage Control, Inc.
- Datom Products
- Eagle Towing & Recovery
- Environmental Products & Services
- Environmental Restoration, Inc.
- Gannett Fleming: Engineers
- K&A Environmental Contractors
- L&S Abatement
- Land-N-Sea Environmental Services
- MARCOR Environmental
- Modern Landfill
- O&M Materials
- Power Component Systems
- Recon Services, Inc.
- Village Restoration & Casualty
- Wyoming Valley Sanitary Authority
- Cohen, Axinn & Cohen
- Fine, Wyatt & Carey PC.
- Hughes, Nicholls & O'Hara
- K&L Gates, LLP.
- Munley, Munley & Cartwright, PC.
- Peck, Brad & Panya
- Rhoads & Sinon, LLP.
- Saidis, Flower & Lindsay
- Thomas, Thomas & Hafer, LLP.
