ESG was established in March of 2006. Through the years, members of ESG have contracted with the following groups:
UNITED STATES
Federal Agencies
- US Army Corps of Engineers—South Pacific Division (Sacramento District)
- US Army Corps of Engineers—Northwest Division (Omaha District, Seattle District)
- USDA Forest Service—Northern Region, (Northern Regional Office, Beaverhead-Deerlodge, Bitterroot, Clearwater, Custer, Dakota Prairie Grasslands, Flathead, Gallatin, Helena, Idaho Panhandle, Kootenai, Lolo, and Nez Perce National Forest
- USDA Forest Service—Rocky Mountain Region (Rocky Mountain Regional Office, Black Hills National Forest, Grand River National Grassland)
- USDA Natural Resource Conservation Service
- USDI Bureau of Indian Affairs—Billings Area Office (Blackfeet, Crow, Fort Belknap, Fort Peck, Northern Cheyenne, Rocky Boys, and Wind River Agencies)
- USDI Bureau of Indian Affairs—Aberdeen Area Office (Eagle Butte Agency)
- USDI Bureau of Land Management, Montana/Dakota State Office, Butte, Lewistown, and Miles City Districts
- USDI Bureau of Land Management, Idaho State Office, Upper Snake River, and Upper Columbia-Salmon/Clearwater Districts
- USDI Fish and Wildlife Service—Colorado (Arapahoe and Browns Park National Wildlife Refuges)
- USDI Fish and Wildlife Service—Montana (Benton Lakes, Charles M. Russell, Hailstone, Halfbreed Lake, Lake Mason, UL Bend, and War Horse National Wildlife Refuges)
- USDI Fish and Wildlife Service—Montana Partners for Fish and Wildlife
- USDI Fish and Wildlife Service—Utah (Seedskadee, Ouray, and Duchesne Wildlife Refuges)
- USDI Fish and Wildlife Service—Wyoming (Seedskadee National Wildlife Refuge)
- USDI National Park Service—California (Joshua Tree National Park)
- USDI National Park Service—Montana (Glacier and Yellowstone National Parks; Grant Kohrs National Historic Site)
- USDI National Park Service—North Dakota (Theodore Roosevelt National Park)
- USDI National Park Service—South Dakota (Mt. Rushmore and Badlands National Parks)
- USDI Bureau of Reclamation—Great Plains Region, Mid-Pacific Region, Pacific Northwest Region
- US Environmental Protection Agency
Montana State Agencies and Institutions
- Montana Department of Environmental Quality
- Montana Department of Fish, Wildlife and Parks
- Montana Department of Justice, Natural Resources Damage Program
- Montana Department of Natural Resources and Conservation
- Montana Department of State Lands, Forestry Division
- Montana Department of Transportation
- Montana State University, Montana Agricultural Experiment Station
- University of Montana, Montana Forest and Conservation Experiment Station
Other State Agencies and Municipalities
- Los Angeles Department of Water and Power
- Metropolitan Wastewater District, San Diego
- Southern Nevada Water Authority
- Vista Unified School District, California
Tribal Entities
- Confederated Salish and Kootenai Tribes of western Montana
- Crow Tribe of southeastern Montana
- Fort Peck Assiniboine and Sioux Tribes of northeastern Montana
- Northern Cheyenne Tribe of southeastern Montana
- Three Affiliated Tribes of North Dakota
Non-Governmental Organizations
- Montana Association of State Grazing Districts
- Montana Flathead Basin Commission
- Montana Natural Heritage Program
- Montana Public Lands Council
- The Nature Conservancy
Private Entities
- Atlantic Richfield Company (ARCO)
- Barnard Construction Company
- Barr Engineering
- Barrick Gold Corporation
- CH2M HILL
- Champion International Corporation
- The Doe Run Company
- Ecology and Environment, Inc.
- EMC-Squared, Inc.
- Envirocon, Inc.
- Glamis Gold Corporation
- HDR Engineering, Inc.
- Jones and Jones
- Kern River Natural Gas Transmission Company
- Lumos and Associates
- Montana Stock Growers Association
- Roosevelt Ranch LLC
- Sander's Ranch Homeowners Association
- SRK Consulting
- Stone Container Corporation
- Teller Wildlife Refuge
- Turner Enterprises, Inc.
- Walker and Associates, Inc.
- Western Energy Company
- Various Private Individuals (names available upon request)
CANADA
- Agriculture and Agri-Food Canada, National Soil and Water Conservation Program
- Agriculture and Agri-Food Canada, Prairie Farm Rehabilitation Administration
- Alberta Agriculture Food and Rural Development
- Alberta Cattle Commission
- Alberta Conservation Association
- Alberta Environment
- Alberta Forestry
- Alberta Riparian Habitat Management Partnership (Cows and Fish Program)
- Alberta Sustainable Resource Development
- Canadian Cattlemen’s Association
- Environment Canada
- Fisheries and Oceans Canada
- Forest Service Canada
- Trout Unlimited Canada
- Sask Water
- Saskatchewan Agriculture and Food
- Saskatchewan Environment and Resource Management
- Saskatchewan Watershed Authority
- Saskatchewan Wetland Conservation Corporation