Woodbridge Office (Headquarters)
4899 Prince William Parkway
Woodbridge, Virginia 22192
Phone: 703-730-4160
Fax:703-337-5359
Email:
info@gctonline.net
Emad Saadeh, P.E. President
esaadeh@gctonline.net
Dulles Office (Laboratory)
21505 Greenoak Way
Dulles, Virginia 20166
Phone: 703-421-4000
Fax: 703-337-5571
Email:
info@gctonline.net
John Vergeres, P.E. Vice President
jvergeres@gctonline.net
