Soldier Discussion Heidi Shyu talks with soldiers during Network Integration Evaluation 15.2 at Fort Bliss, Texas, May 13, 2015. At the time, Shyu served as assistant secretary of the Army for acquisition logistics and technology. Today, she serves as the Defense Department’s undersecretary of defense for research and engineering, and chief technology officer. SHARE: Download: Full Size (0.43 MB) Credit: Vanessa Flores, Army VIRIN: 150513-O-PQ902-943.JPG Photo Gallery