Zoo and aquarium curators and directors are not members of unions, but many join the Association of Zoos and Aquariums, which provides networking opportunities, continuing education classes, publications, career information, job listings, and other resources. The Alliance of Marine Mammal Parks and Aquariums is a membership organization for zoological parks and aquariums.
- Active and Contemplative Religious Sisters and Brothers
- Adventure Travel Specialists
- Agricultural Scientists
- Air Quality Engineers
- Amusement Park Workers
- Animal Behaviorists
- Animal Breeders and Technicians
- Animal Caretakers
- Animal Handlers
- Animal Physical Therapists
- Animal Trainers
- Anthropologists
- Aquarists
- Arborists
- Archaeologists
- Archivists
- Artists
- Bicycle Mechanics
- Biochemists
- Bioenergy/Biofuels Workers
- Biofuels Processing Technicians
- Biofuels Production Managers
- Biofuels/Biodiesel Technology and Product Development Managers
- Biologists
- Biomass Plant Technicians
- Biomass Power Plant Managers
- Book Conservators
- Botanists
- Brownfield Redevelopment Specialists and Site Managers
- Chemists
- Chief Sustainability Officers
- Climate Scientists
- Conservators and Conservation Technicians
- Corporate Climate Strategists
- Cruise Ship Workers
- Directors of Corporate Sponsorship
- Directors of Fund-Raising
- Directors of Volunteers
- Ecologists
- Education Directors and Museum Teachers
- Energy Conservation Technicians
- Energy Consultants
- Environmental Economists
- Environmental Education Program Directors
- Environmental Engineers
- Environmental Lawyers
- Environmental Lobbyists
- Environmental Planners
- Environmental Restoration Planners
- Environmental Scientists
- Environmental Technicians
- EPA Special Agents
- Ethnoscientists
- Exhibit Designers
- Fish and Game Wardens
- Flight Attendants
- Forensic Meteorologists
- Foresters
- Forestry Technicians
- Fund-Raisers
- Gallery Owners and Directors
- Gaming Occupations
- Geological Technicians
- Geologists
- Geophysicists
- Grant Coordinators and Writers
- Green Builders
- Green Hotel/Resort Ecomanagers
- Green Products Manufacturers
- Green Transportation Careers
- Groundwater Professionals
- Hazardous Waste Management Specialists
- Hazardous Waste Management Technicians
- Historians
- Historic Preservationists
- Horticultural Inspectors
- Horticultural Technicians
- Hosts/Hostesses
- Hydropower and Marine Energy Industry Workers
- Inbound Tour Guides
- Indoor Environmental Health Specialists
- Industrial Ecologists
- Land Acquisition Professionals
- Land Trust or Preserve Managers
- Landscape Architects
- Librarians
- Lifeguards and Swimming Instructors
- Lobbyists
- Marine Biologists
- Methane/Landfill Gas Collection System Operators
- Methane/Landfill Gas Generation System Technicians
- Microbiologists
- Molecular and Cellular Biologists
- Museum Attendants
- Museum Directors and Curators
- Museum Technicians
- Music Venue Owners and Managers
- National Park Service Employees
- Naturalists
- Nonprofit Social Service Directors
- Oceanographers
- Park Rangers
- Parking Attendants
- Pet Shop Workers
- Pet Sitters
- Pilots
- Proposal Managers
- Public Interest Lawyers
- Public Opinion Researchers
- Public Relations Specialists
- Rabbis
- Range Managers
- Recreation Workers
- Recycling and Reclamation Workers
- Recycling Coordinators
- Renewable Energy Careers
- Renewable Energy Engineers
- Reservation and Ticket Agents
- Resort Workers
- Rewilders
- Roman Catholic Priests
- Ship's Captains
- Ski Resort Workers
- Social Workers
- Soil Conservationists and Technicians
- Soil Scientists
- Spa Attendants
- Spa Managers
- Space Tourism Managers
- Sports Facility Managers
- Sports Instructors and Coaches
- Stadium Ushers and Vendors
- Strength and Conditioning Coaches
- Swimming Pool Designers
- Taxidermists
- Tour Guides
- Travel Agents
- Veterinarians
- Veterinary Technicians
- Wastewater Treatment Plant Operators and Technicians
- Water/Wastewater Engineers
- Yoga and Pilates Instructors
- Zookeepers
- Zoologists