Below is a list of exotic-animal-oriented organizations and opportunities which might be of interest to you:

International Association for Aquatic Animal Medicine
American Association of Fish Veterinarians
American Association of Zoo Veterinarians
American Zoo and Aquarium Association
House Rabbit Society
Association of Avian Veterinarians
Association of Reptilian and Amphibian Veterinarians
The American Veterinary Medical Association
American Association of Wildlife Veterinarians
American College of Zoological Medicine
European Association of Wildlife Veterinarians
Alliance of Veterinarians for the Environment
International Union for Conservation of Nature
Wildlife Disease Association