Mack Defense has selected XMCO Inc., a wholly-owned subsidiary of Koniag Government Services (KGS), as the Integrated Product Support (IPS) partner for the U.S. Army M917A3 Heavy Dump Truck (HDT) contract. In this capacity, XMCO is responsible for the preparation of all IPS deliverables required to support testing and full materiel release of the system to the U.S. Army.