| Salish Kootenai College | Academic Institution |
| Salish Kootenai College | Academic Institution |
| Schoodic Institute | Non-Profit Organization |
| Seattle University | Academic Institution |
| Ships of Discovery | Non-Profit Organization |
| Sky Island Alliance | Non-Profit Organization |
| Smithsonian Institution | Non-Profit Organization |
| Sonoran Institute | Non-Profit Organization |
| South Dakota School of Mines & Technology | Academic Institution |
| South Dakota State University | Academic Institution |
| Southern Oregon University | Academic Institution |
| Southern Utah University | Academic Institution |
| Southwestern Oklahoma State University | Academic Institution |
| Stevens Institute of Technology | Academic Institution |
| Stockton University | Academic Institution |
| SUNY, College of Environmental Science and Forestry | Academic Institution |
| SUNY, Stony Brook University | Academic Institution |
| Sustainable Coastlines Hawai'i | Non-Profit Organization |
| Texas A&M AgriLife Research | Academic Institution |
| Texas A&M AgriLife Research | Academic Institution |
| Texas State University | Academic Institution |
| Texas Tech University | Academic Institution |
| The Amphibian and Reptile Conservancy | Non-Profit Organization |
| The Arboretum at Flagstaff | Non-Profit Organization |
| The Citadel | Academic Institution |
