US

US Environmental Protection Agency (USEPA) http://www.epa.gov/

Ecological Society of America http://www.esa.org/esa/

Society for Ecological Restoration (SER)  http://ser.org

National Registry of Environmental Professsionals https://www.nrep.org/

North American Association for Environmental Education (NAAEE) http://www.naaee.org/

Interdisciplinary Environmental Association http://ieaonline.org/

National Association of Local Government Environmental Professionals (U.S.) (NALGEP) http://www.nalgep.org/
Brings together local environmental officials to network and share information on innovative environmental practices, conduct environmental policy projects, promote environmental training and education, and communicate the view of local environmental officials on national environmental issues

Public Employees for Environmental Responsibility (PEER) www.peer.org
Works with and on behalf of public employees to safeguard the nation’s natural resources.

Metropolitan Washington Environmental Professionals mwep.org
Promotes contacts among interested persons in the Washington, DC metropolitan area. Membership includes scientists, lawyers, activists, regulators, consultants, and others.

Louisiana Environmental Professionals Association – (LEPA) http://www.lepa.info/

Florida Association of Envrionmental Professionals www.faep-fl.org
Providing information and networking to Florida’s environmental professionals.

Environmental Professionals Organization www.e-p-o.org
California – Multi-disciplinary educational forum for environmental professionals.

Southern California Chinese American Environmental Protection Association https://www.linkedin.com/company/southern-california-chinese-american-environmental-protection-association

Northwest Association for Environmental Professionals (Washington & Oregon) http://www.nwaep.org/

Native American Government Environmental Agencies in the United States http://www.earthdirectory.net/tribes

Society of Environmental Toxicology and Chemistry (SETAC) http://www.setac.org/

Society of Wetland Scientists (SWS) http://www.sws.org/

Soil and Water Conservation Society (SWCS) http://www.swcs.org/

Women’s Environmental Council (WEC) http://www.wecweb.org/