Third Rock Consultants LLC.
- Offers ecological and aquatic assessment, restoration, wetland delineation, environmental assessment/analysis, macroinvertebrate sorting and sampling, endangered species surveys, and general environmental consulting. Includes news and profiles.
- http://www.thirdrockconsultants.com/

Childress and Associates, LLC
- Environmental firm providing professional consulting services to business, government and industry. Includes a search feature, details of services and projects.
- http://www.childressassociates.biz/