Our Clients

Environmental protection isn’t the only goal of our clients, but it’s always part of the solution. We approach each project with the understanding that it is a piece of a larger plan – one that involves balancing the needs of many stakeholders and requirements. TCG is committed to the highest standard of client service and consistent delivery of quality products. Our success depends on our client’s success and we are proud to contribute to their accomplishments, and achievements.

Sample Clients


  • Bureau of Land Management
  • Bureau of Ocean and Energy Management
  • Council on Environmental Quality
  • Department of Homeland Security
  • Department of Veterans Affairs
  • Environmental Protection Agency
  • Federal Emergency Management Agency
  • National Capital Planning Commission
  • National Oceanic Atmospheric Administration
  • Northern Border Regional Commission
  • Nuclear Regulatory Commission
  • Overseas Private Investment Corporation
  • U.S. Army Corps of Engineers
  • U.S. Department of Agriculture
  • U.S. Department of Justice
  • U.S. Fish and Wildlife Service

State and Local Government

  • Vermont Department of Environmental Conservation
  • Vermont Department of Transportation
  • New York State Department of Environmental Conservation 
  • State of Kansas
  • Public Service Commission of the District of Columbia
  • St. Tammany Parish


  • Allegiance Group, LLC
  • Big Belly Solar
  • Dewberry
  • Duke University
  • HDR, Inc.
  • Mabbett
  • SAIC
  • VHB


  • Chittenden Area Transportation Management Association
  • Leahy Center for Lake Champlain
  • The Nature Conservancy
  • Middle Georgia Clean Air Coalition


  • Osage Nation
  • Northwest Indian Fisheries Commission
  • Tulalip Tribes