Regular Members
- Cascade Timber Consulting
- Forest Capital Partners
- Green Diamond Resource Co.
- Longview Fibre Company
- Menasha Forest Products Corporation
- Oregon Department of Forestry
- Oregon State University
- Plum Creek Timber Company
- Pope Resources/Olympic Resource Management
- Port Blakely Tree Farms
- Roseburg Resources
- Stimson Lumber Company
- USDI Bureau of Land Management
- Washington State Dept of Natural Resources
Associate Members
- Starker Forests
Contractual Members
- Lone Rock Timber Company
Liaison Members
- Inland Empire Tree Improvement Cooperative
- Northwest Tree Improvement Cooperative
- University of British Columbia
- University of Washington
- USDA Forest Service, PNW Research Station