Troy, Michigan
Corporate Office
5440 Corporate Drive, Suite 260
Troy, MI, 48098
(313) 962-9000

 

Detroit, Michigan
400 Renaissance Center, Suite 2600
Detroit, MI, 48243

Washington, DC
Rossyln Center
1655 North Fort Myer Dr., Suite 700
Arlington, VA  22209
OpTech number: 703-861-6633

 

India
New No. 2 Sardar Patel Road
Guindy, Chennai 600032

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