American Institute of Biological Science
Chesapeake Bay Foundation
Cyber-Sierra's Natural Resources Job Search
Ecological Society of America
Environmental Career
Environmental Career Opportunities
Environmental Careers Organization
Environmental Expert
Environmental Health Perspectives
Environmental Industry Association
Environmental News Network
Environmental Protection Agency
Green Dream Jobs
Marine Biological Laboratory
Local Government Environmental Assistance Network
National Association of Environmental Professionals
National Council for Science and the Environment
National Wildlife Federation
NewScientist Jobs
North American Association for Environmental Education
Sierra Club 
Student Conservation Association
Water Environment Federation
Wildlife Conservation Society
World Wildlife Fund