Us Defense Investigative Service 116 N 2nd St Clarksville, TN 37040 Phone : (931) 645-5551 Business Category National Security United States Government--defense Department Of, Defense Investigative Service 211b Dunbar Cave Rd Clarksville, TN 37043 Phone : (931) 645-5551 Business Category Government Offices-Federal Government Offices & Public Schools Us Defense Investigative Service 211 Dunbar Cave Rd # B Clarksville, TN 37043 Phone : (931) 645-5551 Business Category National Security