Society of Environmental Journalists - http://www.sej.org/
The organization's aim is to improve the quality, accuracy and visibility of reporting on the environment. Searchable calendar of environmental events and SEJ conferences, issues, jobs, awards and fellowships.

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

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

American Society of Limnology and Oceanography (ASLO) - http://aslo.org/
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.

University Leaders for a Sustainable Future - http://www.ulsf.org/
ULSF promotes academic leadership for the advancement of global environmental literacy.

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

Air & Waste Management Association (A&WMA) - http://www.awma.org/
Professional organization that provides training, information, and networking opportunities to 12,000 environmental professionals in 65 countries. Focus is on air quality, waste management and environmental management.

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

American Academy of Environmental Engineers - http://www.enviro-engrs.org/
Dedicated to excellence in the practice of environmental engineering to ensure the public health, safety, and welfare to enable humankind to co-exist in harmony with nature.

International Society of Biometeorology - http://www.es.mq.edu.au/ISB/
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.

Society of Environmental Toxicology and Chemistry - http://www.setac.org/
SETAC is an independent, nonprofit professional society that provides a forum for individuals and institutions engaged in Study of environmental issues, management and conservation of natural resources, environmental education, and environmental research and development.

International Environmental Modelling and Software Society - http://www.iemss.org/
For private persons and organizations dealing with environmental modelling, software and related topics. Organization information, upcoming conferences, and links to related sites.

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

NABS- North American Benthological Society Home Page - http://www.benthos.org/
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.

International Society of Environmental Forensics - http://www.environmentalforensics.org
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 journal.

Soil and Water Conservation Society - http://www.swcs.org/
Soil and Water Conservation Society is a non-profit, scientific and educational organization of professional conservationists.

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

Society for Conservation Biology (SCB) - http://conbio.net/
International professional organization promoting the scientific study of phenomena that affect the maintenance, loss, and restoration of biological diversity.

Environmental Law Alliance Worldwide (E-LAW) - http://www.elaw.org/
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.

ISEP - International Society for Environmental Protection - http://www.isep.at/
A forum for the exchange of environmental information between environmental experts, administration, industry, research and the public.

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

Canadian Society of Environmental Biologists - http://www.freenet.edmonton.ab.ca/cseb/
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.

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

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

Physicians and Scientists for Responsible Application of Science and Technology - http://www.psrast.org/
PSRAST's purpose is to provide comprehensive, interdisciplinary and impartial assessments of new applications, as industrial and political influences tend to invalidate the established evaluation procedures.

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

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

National Association for Interpretation - http://www.interpnet.com/
A private, nonprofit professional association with a membership of 3,600 members in 22 countries and it is dedicated to inspiring leadership and excellence to advance natural and cultural interpretation as a profession.

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

National Registry of Environmental Professionals - http://www.nrep.org/index.html
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 centralized source -- so that the public, government, employers and insurers can justify the importance and acceptance of such individuals to carry out operation and management of environmental activities.

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

Australasian Pollination Ecologists Society (A.P.E.S.) - http://www.ecoman.une.edu.au/apes/apes.htm
The aims of the Society are to participate in, encourage and communicate research in the field of pollination ecology in Australasia.

NALGEP - National Association of Local Government Environmental Professionals (U.S.) - 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.

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

Australian Seafood Industry Council - http://www.asic.org.au/
Commercial fishing representatives that play a vital role in the environmental management and resource sustainability of Australia's fisheries.

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

Institute of Professional Environmental Practice - http://www.ipep.org/
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.

Environmental Services Association of Alberta (ESAA) - http://www.esaa.org/
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.

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

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

Forest Service Employees for Environmental Ethics - http://www.fseee.org/
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.

Biotica Ecological Society - http://www.biotica-moldova.org
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.

Environmental Assessment Association (EAA) - http://www.iami.org/eaa.cfm
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.

Canadian Coastal Science and Engineering Association (CCSEA) - http://www.cciw.ca/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 coastal zone.

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

iciEMA - http://iciema.com/
The Industrial, Commercial and Institutional Environmental Managers Association is a group of individuals in the environmental field to promote the exhange of ideas.

The International Bryozoology Association (IBA) - http://www.civgeo.rmit.edu.au/bryozoa/iba.html
This organisation was formed by a small group back in 1968 to encourage research and promote an exchange of ideas on the Bryozoa. Since its foundation is has grown into an association numbering some 200 members world-wide, and covering both the fields of palaeontology and zoology.

American Society of Ichthyologists and Herpetologists - http://www.utexas.edu/ftp/depts/asih/
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.

OFWIM--The Organization of Fish and Wildlife Information Managers - http://fwie.fw.vt.edu/ofwim/index.htm
Their goal is to promote the management and conservation of natural resources by facilitating technology and information exchange among fish and wildlife information managers.

Institution of Environmental Sciences - http://www.ies-uk.org.uk/
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.

Round Table Group - http://www.round.table.com/
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.

Environment Institute of Australia and New Zealand - http://www.eia.asn.au/
Established to facilitate interaction among environmental professionals and advance ethical and competent environmental practice. Includes e-mail lists, employment postings, information about conferences and publications, and other organization information.

Southwestern Association of Naturalists - http://www.emporia.edu/swan/home.htm
Group founded in May 1953 to promote the field study of plants and animals (living and fossil) in the southwestern United States, México, and Central America and to aid in the scientific activities of its members.

Northwest Association of Environmental Professionals - http://www.nwaep.org
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.

BEAC (Board of Environmental Auditor Certifications) - http://www.rutgers.edu/Accounting/raw/beac/
Mission is to promote high standards of practice and efforts to be the lead organization for quality certification of environmental, health and safety auditing professionals.

IChemE EPSG Knowledge Management Database - http://epsg.icheme.org/
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.

Michigan Association of Hazardous Materials Responders - http://www.kcaa.org/MAHMR
Resource site and team registry for Hazardous Materials teams in Michigan. Organization provides training and links to assist HazMat teams.