- Aerojet Rocketdyne
- Air Products and Chemicals, Inc.
- American Pacific Corporation
- Johnson Controls
- Brown and Caldwell
- Deloitte
- Felman Production
- Freeport-McMoRan Inc.
- Kennametal Inc.
- Park Water Company
- Philip Morris International
- PricewaterhouseCoopers
- The Dow Chemical Company
- W.R. Grace
- Bucks County Water and Sewer Authority
- National Indian Gaming Commission
- National Oceanic and Atmospheric Administration
- U.S. Centers for Disease Control and Prevention
- U.S. Department of Labor – Employee Benefits Security Administration
- Water Research Foundation
- American Association of Railroads
- American Chemistry Council
- American Composite Manufacturers Association
- American Frozen Food Institute
- American Petroleum Institute
- American Public Power Association
- American Water Works Association
- Biotechnology Industry Organization
- Cigar Association of America
- Corn Refiners Association
- Edison Electric Institute
- International Tungsten Industry Association
- National Mining Association
- National Rural Electric Cooperative Association
- Pharmaceutical Manufacturers Association
- Snack International
- Styrene Information and Research Council
- The Fertilizer Institute
- Utility Solid Waste Activities Group
- Waters Advocacy Coalition