Private Sector
- American Forest Foundation
- Build it Green
- Center for Sustainable Energy
- Chesapeake Bay Program
- CB Richard Ellis (CBRE)
- Ducks Unlimited Canada
- Electric Power Research Institute
- Huron River Watershed Council
- I Love a Clean San Diego
- Katz & Associates
- Keep America Beautiful
- Maritime Aquarium at Norwalk
- McKenzie Mohr & Associates
- Ogilvy Public Relations Worldwide
- Operation Fuel
- Oregon Coast Aquarium
- Southeast Sustainability Directors Network (SSDN)
- TreePeople
- Urban Sustainability Directors Network
- Vermont Energy Investment Corporation
- Waste Management
- Wildlife Conservation Society (Bronx Zoo)