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Contact the Energy Experts Today

GTI is well known for our connections across the energy value chain and role as a trusted partner. We are continually expanding our relationships to build effective teams that can deliver critical insight and contribute funding to support key energy initiatives.

If you have a question about GTI or would like to partner with our team, please reach out to us.

GTI and subsidiary locations map

GTI HeadquartersGTI office entrance in Des Plaines, IL

1700 S Mount Prospect Road
Des Plaines, IL 60018
P: 847-768-0500
F: 847-768-0501

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Local hotel information

Washington Office

1250 H Street, NW
Suite 880
Washington, DC 20005
P: 847-768-0511
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Houston Office

410 Pierce Street
Houston, TX 77002
P: 713-357-9503
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Davis CA Building Energy Efficiency Group

412 F Street
Davis, CA 95616
P: 530-758-2392
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LA Advanced Energy Systems Group (Woodland Hills)

5945 Canoga Avenue
Woodland Hills, CA 91367
P: 818-405-9541
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Frontier Energy, Inc.

1000 Broadway
Suite 410
Oakland, CA 94607
P: 510-444-8707
Frontier Energy locations

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