- ADSC: International Association of Foundation Drilling
- Belfor USA
- Construction Institute of the American Society of Civil Engineers
- Construction Management Association of America
- Drug Free Workplace Alliances
- Gilbane Building Company
- Independent Electrical Contractors, Inc.
- International Safety Equipment Association
- Mason Contractors Association of America
- Modular Building Institute signed July 28, 2004.
- National Association of Home Builders
- National Utility Contractors Association
- Sealant Waterproofing and Restoration Institute
- Sheet Metal and Air Conditioning Contractors National Alliance
- The Roadway Work Zone Safety and Health Coalition
- Washington Group International