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


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

State and Local Government

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


  • Chittenden Area Transportation Management Association
  • Climate Economy Action Center of Addison County
  • Leahy Center for Lake Champlain
  • Middle Georgia Clean Air Coalition
  • The Nature Conservancy


  • Northwest Indian Fisheries Commission
  • Osage Nation
  • Tulalip Tribes


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