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- Baltimore, MD
- Barton & Loguidice
- Best Foods
- BETA Group
- Blasland, Bouck & Lee
- Boston BWSC, MA
- Boston MWRA, MA
- C.T. Male
- Camp Dresser & McKee
- CH2M Hill
- Chicago, IL
- Clough Harbour
- Daylor Consulting
- Dufresne Henry
- E. A. Fish
- Earth Tech
- Electrical Appartus & Power
- Fay, Spofford & Thorndike
- Fuss & O'Neill
- Gibbons, Esposito & Boyce
- Greeley and Hansen
- Guertin-Elkerton
- H.W. Lochner
- H2M
- Hazen and Sawyer
- HNTB
- Hoyle Tanner
- HydroQual
- Lockwood, Kessler & Bartlett
- Maguire Group
- Malcolm Pirnie
- Merritt Contractors
- Metcalf & Eddy
- Montgomery Watson
- NAB Construction
- New York City DEP, NY
- Newark, NJ
- Novartis Pharmaceuticals
- Novelli Contracting
- O'Brien & Gere
- Onondaga County, NY
- Parsons Brinkerhoff
- Philadelphia, PA
- Port Authority of New York and New Jersey
- R.H. White Construction
- Rizzo Associates
- Roy F. Weston
- SEA Consultants
- Stearns & Wheler
- Sverdrup
- Texas Instruments
- Tighe & Bond
- Tutela
- URS
- Vanasse Hangen Brustlin
- Washington, DC
- Wescott & Mapes
- Weston & Sampson
- Woodard & Curran
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