CONTACT

get in touch

GSI has primary offices in Texas and California with a workforce spread around the globe. Reach out and we’ll get back to you soon!

HEADQUARTERS:

2211 Norfolk St. Suite 1000 Houston, TX 77098

SOCIAL:

AUSTIN OFFICE:

9600 Great Hills Trail
Suite 350E
Austin, TX 78759
512.346.4474

IRVINE OFFICE:

19200 Von Karman
Suite 800
Irvine, CA 92612
949.679.1070

OAKLAND OFFICE:

155 Grand Ave.
Suite 704
Oakland, CA 94612
510.463.8484

FOLSOM OFFICE:

1024 Iron Point
Suite 1001
Folsom, CA 95630
510.463.8484

California

Folsom Office

1024 Iron Point Road,
Suite 1084
Folsom, California 95630
(510) 463-8484

[ Directions ]

Irvine Office

19200 Von Karman, Suite 800
Irvine, California 92612
(949) 679-1070

[ Directions ]

Oakland Office

155 Grand Avenue, Suite 704
Oakland, California 94612
(510) 463-8484

[ Directions ]

Satellite Office

Santa Rosa, California 95403
(707) 953-4440

COLORADO

Satellite Office

Denver, Colorado
(303) 548-2851

Massachusetts

Satellite Office

Boston, Massachusetts
(617) 823-2540

New york

Fayetteville Office

7000 East Genesee Suite, Building C
Fayetteville, NY 13066
(315) 396-6655

[ Directions ]

Texas

Corporate Office

2211 Norfolk, Suite 1000
Houston, Texas 77098
(713) 522-6300

[ Directions ]

Austin Office

9600 Great Hills Trail,
Suite 350E
Austin, Texas 78759
(512) 346-4474

[ Directions ]

Satellite Office

San Antonio, Texas
(512) 294-7509

South Carolina

Satellite Office

Charleston, South Carolina

VIRGINIA

Herndon Office

626 Grant Street, Suite C
Herndon, Virginia 20170
(571) 238-6916

[ Directions ]

WASHINGTON

Washington Office

611 Columbia Street NW, Suite 2C
Olympia, Washington 98501
(925) 322-9720

[ Directions ]