- Consolidated Edison Company of New York, Inc
- National Grid
- Public Service Enterprise Group (PSEG)
- KeySpan
- Trigen Energy Corporation
- Baltimore Gas & Electric Company
- The Port Authority of New York and New Jersey (PANYNJ)
- New Jersey Turnpike Authority (NJTA)
- New Jersey Department of Transportation (NJDOT)
- New York State Department of Transportation (NYSDOT)
- New York City Metropolitan Transit Authority (NYC MTA)
- New York City Department of Transportation (NYC DOT)
- Delaware River Joint Toll Bridge Commission
- New Jersey Transit
- Connecticut Department of Transportation (CTDOT)
- United States Department of Justice
- United States Air Force
- United States Army
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- Massachusetts Port Authority
- New York City Department of Design and Construction (NYC DDC)
- New York City Department of Environmental Protection (NYC DEP)
- Bristol-Myers Squibb
- Johnson & Johnson
- Hoffmann-La Roche
- Canadian Pacific Railway
- The Coca-Cola Company
- Brookhaven National Laboratories
- New York Presbyterian Hospital
- Passaic Valley Sewerage Commissioners
- Ocean County Utilities Authority
- Stamford Water Pollution Control Authority
- Atlantic County Utilities Authority
- District of Columbia Water and Sewer Authority
- City of Baltimore, MD
- Westchester County Department of Public Works
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