Union membership is more common at publicly operated zoos, but zookeepers may be unionized at privately run institutions as well. There is no single zookeepers' union, and a variety of different unions represent the employees at various zoos and aquariums. Some zookeepers join the American Association of Zoo Keepers and the Association of Zoos and Aquariums, which provide networking opportunities, publications, career information, continuing education classes, job listings, and other resources.
- Animal Behaviorists
- Animal Breeders and Technicians
- Animal Caretakers
- Animal Handlers
- Animal Physical Therapists
- Animal Trainers
- Anthropologists
- Aquarists
- Archaeologists
- Archivists
- Artists
- Book Conservators
- Conservators and Conservation Technicians
- Education Directors and Museum Teachers
- Environmental Education Program Directors
- Ethnoscientists
- Exhibit Designers
- Gallery Owners and Directors
- Grant Coordinators and Writers
- Historians
- Historic Preservationists
- Museum Attendants
- Museum Directors and Curators
- Museum Technicians
- National Park Service Employees
- Pet Shop Workers
- Pet Sitters
- Rewilders
- Taxidermists
- Tour Guides
- Veterinarians
- Veterinary Technicians
- Zoo and Aquarium Curators and Directors
- Zoologists