| Name | Emphasis | Location | Region |
|---|
| American Public Health Association | Public Health | Various | International |
| Bermuda Biological Station For Research | Biology, Marine Studies, Oceanography | Bermuda | International |
| Central Caribbean Marine Institute | Marine Science and Biodiversity | Little Cayman, Cayman Islands | International |
| DAAD Rise (Research Internships in Science and Engineering | biology and earth sciences | Germany | International |
| ELI | Various | Various | International |
| German Academic Exchange Service (DAAD) | Various | Germany | International |
| Global Volunteers | Depends on location | Worldwide | International |
| HELP International | Public Health | Various | International |
| International Atomic Energy Agency (IAEA) | Various | Vienna, Austria | International |
| International Service Learning Alliance | Environmental | Various | International |
| Intrax | Clinical health/public health | Various | International |
| National Sustainable Agriculture | Various | Canada | International |
| Oceans Campus | Marine Biology | Mossel Bay, South Africa | International |
| Sanger Institute | Molecular Biology, Biology, Genetics, Bioinformatics, etc. | Cambridge, United Kingdom | International |
| Smithsonian Institutes | Various | Various | International |
| Tahoe-Baikal Summer Research | Environmental Studies | Lake Baikal & Lake Tahoe, Russia & California | International |
| UCLA Ecology & Evolutionary Biology | Ecology, Behavior and Evolution, Biology, and Marine Biology | Africa, South and Central America, and French Polynesia | International |
| Wildlife Conservation Society | Wildlife & Wildland Conservation | Various | International |
