 In addition, he has lectured at Harvard University, Georgetown University, the University of California at Irvine, University of Maryland, the Army War College, the Air War College, the Naval War College, and the Naval Postgraduate School.Prior to joining the Office of Force Transformation, Garstka was the Chief Technology Officer in the Joint Staff Directorate for Command, Control, Computer and Communications (C4) Systems.In this capacity, he played a key role in the development and conceptualization of network-centric warfare and was the Joint Staff lead for the Department of Defense's Report to Congress on Network Centric Warfare.