TGG provides consulting services for clients throughout the United States and Canada. We have worked with clients in California, Florida, New York and three New England States. We have also consulted with clients in the provinces of Quebec, Ontario, Manitoba and British Columbia.

Our client base includes energy sector companies (electric and gas utilities, marketers, project developers and equipment providers), regulators, government, customer and environmental groups, North American Native/First Nations organizations and start-up businesses.

The following is a selected client list:

American Rivers
Cambridge Energy Research Associates
Conservation Law Foundation
Conservation Services Group
Cornell University (Cornell Global Labor Institute)
Energy Foundation
Environmental Defence Canada
Environmental Defense Fund
Grand Council of the Crees (of Québec)
Green Energy Coalition (Ontario)
Greenpeace, U.S.A. and International
Greenpeace Canada
Independent Power Producers of New York
Maine Public Utilities Commission Staff
Massachusetts Division of Energy Resources
National Grid (USA)
Natural Resources Council of Maine
Natural Resources Defense Council
New Jersey Conservation Foundation
New York City Department of Telecommunications and Energy
Oil Change International
Ontario Metis and Aboriginal Association
Option consommateurs 
Pace University Center for Environmental Legal Studies
Pimicikamak Cree Nation 
Pollution Probe
Sierra Club (National, Atlantic Chapter and Manitoba Branch)
Simon Fraser University (Centre for Public Policy Research)
Southern States Energy Board
SunPower Corporation
Synapse Energy Economics, Inc.
The Greenlining Institute 
TURN (The Utility Reform Network)