Defense/Government Contractors go Results Found: 4 Button group with nested dropdown Yorktown Systems Group, Inc. Yorktown Systems Group, Inc. 11820 Fountain Way Suite 402 Newport News VA 23606 (877) 406-0262 Lockheed Martin Lockheed Martin 105 Sentinel Ct Simpsonville SC 29681 (864) 270-1120 Spectrum Spectrum 1 Bayport Way, Suite 300 Newport News VA 23606 (757) 224-7500 ViGYAN, Inc. ViGYAN, Inc. 30 Research Drive Hampton VA 23666-1325 (757) 865-1400