International Society of Biometeorology
- The motivation of the foundation of ISB was to bring together scientists working in the field of Biometeorology, who are interested in environmental and ecological problems.
- http://biometeorology.org/

American Society of International Law's Wildlife Interest Group
- Focuses on the effectiveness of international wildlife treaty regimes and other international efforts to conserve endangered wildlife species.
- http://www.internationalwildlifelaw.org/

National Association of Environmental Professionals
- (U.S.) - multidisciplinary association dedicated to the advancement of the environmental professions in the U.S. and abroad.
- http://www.naep.org/

Canadian Coastal Science and Engineering Association (CCSEA)
- The Association provides a forum to address issues relevant to Canada's coastal zones (Atlantic, Pacific, Great Lakes and Arctic) - bringing together scientists, engineers and managers from a broad range of disciplines, all with a common interest in the c
- http://www.cciw.ca/ccsea/intro.html

Canadian Society of Environmental Biologists
- Members are professionally-trained biologists and biology students whose primary focus is to further the conservation and prudent management of Canada's natural resources based on sound ecological principles.
- http://www.cseb-scbe.org/

Louisiana Environmental Professionals Association
- LEPA explains its purpose and history, and gives information on its officers, meetings, and membership.
- http://www.lepa.info

Academy of Certified Hazardous Materials Managers
- US association of certified environmental professionals. Chapters, members, conference.
- http://www.achmm.org

The British Land Reclamation Society
- A multidisciplinary and interdisciplinary organisation concerned with the reclamation, rehabilitation and restoration of land, including contaminated, derelict and abandoned land from mineral working and former urban and industrial uses.
- http://www.blrs.org

PICES - North Pacific Marine Science Organization
- Organized to promote and coordinate marine research in the northern North Pacific and adjacent seas.
- http://www.pices.int/

Institute of Environmental Management
- UK membership organisation for individuals involved in environmental management and assessment, whether they be in business, government, consultancy or the regulators.
- http://www.iema.net/

Institution of Environmental Sciences
- Professional body for environmental scientists in the UK to provide balanced, scientific information on the environment to members and the public. Includes organization information, journal archive, and links.
- http://www.ies-uk.org.uk/

The Institute for Tribal Environmental Professionals
- Provides information, resources, and discussion forums, relating to tribal environmental issues and management.
- http://www4.nau.edu/itep/

International Society of Environmental Forensics
- Professional association in the emerging field of scientific investigations that address environmental contamination subjected to law, court arbitration, public debate, or formal argumentation. About the organization, upcoming workshops, and society journ
- http://www.environmentalforensics.org

NABS- North American Benthological Society Home Page
- An international scientific organization whose purpose is to promote better understanding of the biotic communities of lake and stream bottoms and their role in aquatic ecosystems.
- http://www.benthos.org/

Environmental Law Alliance Worldwide (E-LAW)
- A network of public interest attorneys, scientists, and other advocates around the world who support each others' work by exchanging legal and scientific information to defend the environment in their home countries.
- http://www.elaw.org/

Institute of Professional Environmental Practice
- IPEP's objectives are to improve the practice and educational standards of environmental professionals and to administer the QEP and EPI application, examination, and certification process.
- http://www.ipep.org/

Australian Society for Limnology
- A scientific society whose focus is the study and management of inland waters.
- http://www.asl.org.au/

International Humic Substances Society
- The Society is recognized as a world leader in fostering scientific education and research, and promoting public understanding of humic substances.
- http://www.ihss.gatech.edu/

Environmental Services Association of Alberta (ESAA)
- Business group dedicated to building a strong environmental industry. Group offers the Environment Business (EB) series of professional development courses designed to enhance the technical knowledge of environment industry personnel.
- http://www.esaa.org/

National Association for Interpretation
- NAI is a private, nonprofit, international association for professionals in natural and cultural interpretation (on-site informal education programs at parks, zoos, nature centers, historic sites, museums, and aquaria).
- http://www.interpnet.com/

International Marine Animal Trainers Association
- Founded to foster communication, professionalism, and cooperation among those who serve marine mammal science through training, public display, research, husbandry, conservation, and education.
- http://www.imata.org/

Society for Preservation of Natural History Collections
- SPNHC is a multidisciplinary organization composed of individuals who are interested in development and preservation of natural history collections
- http://www.spnhc.org/

EWRI - Environmental and Water Resources Institute of the American Society of Civil Engineers
- An association of environmental and water resources engineers and scientists.
- http://www.ewrinstitute.org/

Geneva Environment Network
- Brings together UN organizations, government agencies, NGOs and industry resident in Geneva, Switzerland.
- http://www.environmenthouse.ch/

The George Wright Society
- A nonprofit association of protected area professionals dedicated to the preservation of cultural and natural parks and reserves.
- http://www.georgewright.org/

Northwest Association of Environmental Professionals
- We are environmental professionals in Washington and Oregon dedicated to sharing information and ideas while striving to advance the highest standards of ethics and competency within the profession.
- http://www.nwaep.org

Environmental Assessment Association (EAA)
- International organization dedicated to providing members with information and education on real estate environmental inspections, testing and hazardous material removal. Information on the organization and its programs.
- http://www.iami.org/eaa.cfm

National Society for Clean Air and Environmental Protection
- UK association of environmental protection specialists. Works on environmental protection and management issues including air quality and noise.
- http://www.nsca.org.uk/

IChemE EPSG Knowledge Management Database
- Environmental Protection Subject Group of the IChemE, Institution of Chemical Engineers. This group's aims are to further the science of chemical engineering and its positive effects on the environment.
- http://epsg.icheme.org/

National Registry of Environmental Professionals
- The mission of NREP is to provide legal and professional recognition of individuals possessing education, training and experience as environmental managers, engineers, technologists, scientists and technicians -- and to consolidate that recognition in one
- http://www.nrep.org/index.html

Species Survival Commission
- Their mission is to conserve biological diversity by developing and executing programs to study, save, restore, and manage wisely species and their habitats.
- http://iucn.org/themes/ssc/

Forest Service Employees for Environmental Ethics
- Nonprofit organization working to forge a socially responsible value system for the U.S. Forest Service. About the organization, issues information and action alerts, and advice for federal employees seeking to effect change.
- http://www.fseee.org/

Round Table Group
- An international consortium of academic experts and thought leaders in a number of specialized business-related fields. RTG matches companies with these leading scholars and industry experts to provide tailored consulting services.
- http://www.round.table.com/

Public Employees for Environmental Responsibility
- Advocacy group supporting professional employees of government regulatory and resource agencies in the United States.
- http://www.peer.org/

American Society of Ichthyologists and Herpetologists
- The programs here are part of a global effort to interpret, understand, and conserve the Earth's natural diversity and to contribute to the wise use of natural resources for the long-term benefit of humankind.
- http://www.utexas.edu/ftp/depts/asih/

NALGEP - National Association of Local Government Environmental Professionals (U.S.)
- 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 offi
- http://www.nalgep.org/

International Erosion Control Association
- For professionals in the erosion and sediment control industry.
- http://ieca.org/

Association for the Environmental Health of Soils (AEHS)
- For professionals concerned with the challenge of soil protection and cleanup.
- http://www.aehs.com/

American Society of Limnology and Oceanography (ASLO)
- The purposes of ASLO are to promote the interests of limnology, oceanography and related sciences, to foster the exchange of information across the range of aquatic science, and to further investigations dealing with these subjects.
- http://aslo.org/

American Indoor Air Quality Council
- A non-profit organization that provides its membership IAQ training, IAQ certification, and bi-monthly newsletters.
- http://iaqcouncil.org

Biotica Ecological Society
- Moldovan environmental association. Areas of activity include conservation of biodiversity; development of national environmental legislation and public participation in decision-making process; and creation of a legal basis for NGOs activity in Moldova.
- http://www.biotica-moldova.org