- State of Kansas - State Contract
- State of Missouri - State Contract
- State of Illinois
- State of Iowa - State Contract
- CAL-AIR
- Hussman
- Waste Management
- General Motors
- Applied Energy Solutions
- Emerson Electric
- St. Louis County
- Pillsbury
- Missouri Department of Natural Resources
- Kansas State University
- Viacom
- FEDEX
- Trammel Crow
- University of Missouri
- COSCO
- Sprint
- City of St. Louis
- Nissan
- Grainger
- Hallmark
- Walgreens
- Crystal Clean
- Financial Energy Management
- Haz-Waste Inc.
- Pollution Control Industries
- Air Cycle Corporation
- Envirolight & Disposal Inc.
- Chevron Texaco
- Sunbelt Environmental
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- United States Air Force
- United States Army
- United States Post Office
- Ford Motor Company
- Honeywell
- General Mills
- Bausch & Lomb
- Kawasaki
- Maritz
- Federal Reserve Bank
- Southwestern Bell
- Pepsi Cola
- Home Depot
- Ameren UE
- Osram Sylvania
- WAL*MART
- Marriott
- Leggett & Platt
- Kroger
- Owens Corning
- City of Kansas City
- Dillards
- AT & T
- Dollar General
- U.S. Medical Center
- Harris Lighting
- Energy Concepts and Solutions
- Johnson Controls
- Heritage Environmental
- Luminaire
- Phillips Services
- Bass Pro
- Midwest Asbestos
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