| US Dept. of the Interior | US Fish and Wildlife Service; National Park Service; Bureau of Land Management |
| US Dept. of Commerce | National Oceanic and Atmospheric Administration |
| US Department of Defense* | |
| US Environmental Protection Agency** | |
| US Dept. of Agriculture** | |
| State of Louisiana | Coastal Protection and Restoration Authority; Oil Spill Coordinator's Office, Dept. of Environmental Quality; Dept. of Wildlife and Fisheries; Dept. of Natural Resources |
| State of Mississippi | Dept. of Environmental Quality |
| State of Alabama | Dept. of Conservation and Natural Resources; Geological Survey of Alabama |
| State of Florida | Dept. of Environmental Protection; Fish and Wildlife Conservation Commission |
| State of Texas | Parks and Wildlife Dept.; General Land Office; Commission on Environmental Quality |
* Not on the Trustee Council
** Designated as trustees on September 10, 2012 by Executive Order 13,626.