| Aquascape Wetland and Environmental Services | | Offers services in stream assessments, wetland delineations, constructing mitigation wetlands, environmental assessments and permitting, and ecological restoration. Based in Grove City, Pennsylvania, USA. |
| Biota | | Conservation and ecological consulting, UK. |
| BIOTEC | | Consulting Engineers and Biologists in soil bioengineering: solutions to counter river erosion and hillside soil erosion using living plants. Based in Lyon, France. |
| Carter Ecological Limited | | Offers ecological surveys and assessments. Based in Banbury, Oxfordshire, England. Qualifications information, description of services offered, and client list. |
| Condor Environmental Planning Services, Inc. | | Offers habitat preservation and conservation planning, long-range planning services for community sustainable development, stormwater management consulting, and related services. Santa Barbara, California. |
| Conservation Consultancy, Ltd. | | Describes capabilities and offers expert services in ecological surveys, environmental impact assessment, and mitigation and monitoring. Based in Bath, England. |
| Conservation Imaging | | Nonprofit organization that conducts applied landscape-scale conservation research and provides technical expertise for conservation projects and nonprofit institutions. Idaho, USA. |
| Consult-Eco | | Invertebrate and ecological surveying; environmental education and training. Location: Cheshire, UK. |
| Conway Conservation, Inc. | | Environmental consulting services focused on ecological resource protection and green infrastructure planning. Florida, USA. |
| Creative Habitat Corporation | | Ecological consultant specializing in upland and wetland restoration and creation, bioengineering, and wildlife research. New York, USA. |
| Denis J Vickers | | Ecological consultancy service for statutory and local authorities, landscape architects and other bodies in Greater London (UK) and beyond. |
| Eco Euro | | European ecologist, building a reputation for conducting forestry and ecology related research work of international significance and quality. |
| Ecological Consulting | | Professional consulting services supporting ecosystem management, inventory, and research. Location: Ontario, Canada. |
| Ecological Land Management | | UK consultants offer service in habitat management, wildlife mitigation schemes, pond creation and management, invasive weed control, bank stabilisation, and related. |
| Ecological Survey and Monitoring | | A small ecological consultancy specialising in ecological survey in Scotland. NVC and Phase 1 surveys; monitoring woodland regeneration, levels of grazing, and browsing, and Ecological Restoration projects. |
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