GSI would like to hear from you.

For inquiries about the GSI Family of Companies, including contract opportunities and how we may be able to provide services to meet your project needs, please email us at info@gsisg.com, and we will respond as quickly as we can. For employment opportunities, please see our CAREERS page.


GSI Corporate Headquarters
181 S. Kukui Street, First Floor
Honolulu, Hawaii 96813
t: 808-834-4631
f: 808-356-0900
e: info@gsisg.com
GSI Office Locations
Honolulu, Hawaii
Kamuela, Hawaii
Tamuning, Guam
Lakewood, Washington
Boulder, Colorado
Washington, DC
Flemington, New Jersey
East Haven, Connecticut