LOCATIONS

GSI PRESENCE

GSI is an expanding network of environmental professionals with brick-and-mortar offices in California, New York, Texas, Virginia, and Washington. Our staff works remotely from several other states assisting projects globally.

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
(415) 867-7675

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 ]

LIFELONG CAREERS

GSI is an employee focused, growing company with
superior compensation, benefits, professional
development, and potential for advancement.