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Contact Us

For inquiries about the GSI Family of Companies, including contract opportunities or how we can support your project needs, please email info@gsisg.com.

For employment opportunities, please visit our CAREERS page.

Corporate Headquarters - Honolulu

181 South Kukui Street, Second Floor
Honolulu, Hawai`i 96813

Phone: (808) 834-4631
Fax: (808) 356-0900
Email: info@gsisg.com



Other Office Locations

Kapolei, Hawai`i
Boulder, Colorado
Dupont, Washington
Flemington, New Jersey
Belcamp, Maryland
Dededo, Guam
Yokosuka, Japan

GSI Office Locations