There is no union available to lobbyists. Some lobbyists join the American Society of Association Executives, American Association of Political Consultants, and Women in Government Relations, which provide networking events, conferences, and other resources. The National Institute for Lobbying and Ethics offers a public policy certificate program for lobbyists and governmental affairs, grassroots, social media, public relations, and corporate/association professionals at all levels.
- Active and Contemplative Religious Sisters and Brothers
- Agricultural Scientists
- Air Quality Engineers
- Ambassadors
- Aquarists
- Arborists
- 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
- Botanists
- Brownfield Redevelopment Specialists and Site Managers
- Campaign Workers
- Chemists
- Chief Sustainability Officers
- City Managers
- Climate Scientists
- Congressional Aides
- Corporate Climate Strategists
- Directors of Corporate Sponsorship
- Directors of Fund-Raising
- Directors of Volunteers
- Ecologists
- Energy Brokers
- Energy Conservation Technicians
- Energy Consultants
- Environmental Economists
- Environmental Education Program Directors
- Environmental Engineers
- Environmental Lawyers
- Environmental Planners
- Environmental Restoration Planners
- Environmental Scientists
- Environmental Technicians
- EPA Special Agents
- Federal and State Officials
- Fish and Game Wardens
- Foreign Service Officers
- Forensic Meteorologists
- Foresters
- Forestry Technicians
- Fuel Cell Engineers
- Fuel Cell Technicians
- Fuel Cell Technology Workers
- Fund-Raisers
- Futurists
- Geological Technicians
- Geologists
- Geophysicists
- Geotechnical Engineers
- Geothermal Energy Industry Workers
- Geothermal Production Managers
- Geothermal Technicians
- 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
- Historic Preservationists
- Horticultural Inspectors
- Horticultural Technicians
- Hydroelectric Plant Technicians
- Hydroelectric Production Managers
- Hydropower and Marine Energy Industry Workers
- Indoor Environmental Health Specialists
- Industrial Ecologists
- Intelligence Officers
- Interpreters
- Land Acquisition Professionals
- Land Trust or Preserve Managers
- Landscape Architects
- Librarians
- 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
- National Park Service Employees
- Naturalists
- Nonprofit Social Service Directors
- Oceanographers
- Park Rangers
- Policy Analysts
- Political Columnists and Writers
- Political Consultants
- Political Reporters
- Political Scientists
- Political Speechwriters
- Press Secretaries
- Proposal Managers
- Public Interest Lawyers
- Public Opinion Researchers
- Public Relations Specialists
- Rabbis
- Range Managers
- Recycling and Reclamation Workers
- Recycling Coordinators
- Regional and Local Officials
- Renewable Energy Careers
- Renewable Energy Engineers
- Renewable Energy Site Assessors
- Rewilders
- Roman Catholic Priests
- Social Workers
- Soil Conservationists and Technicians
- Soil Scientists
- Solar Energy Industry Workers
- Solar Energy Installation Managers
- Solar Energy Sales Representatives
- Solar Engineers
- Solar Thermal Installers and Technicians
- Statisticians
- Translators
- Urban and Regional Planners
- Wastewater Treatment Plant Operators and Technicians
- Water/Wastewater Engineers
- Wind Energy Engineers
- Wind Energy Industry Workers
- Wind Energy Operations Managers
- Wind Energy Project Managers
- Zoo and Aquarium Curators and Directors
- Zoologists