Principal Deputy, Director of Defense Research and Engineering for Advanced Capabilities Terence Emmert was designated as Principal Deputy, Director of Defense Research and Engineering for Advanced Capabilities (PD, DDRE (AC)) in October 2018 and with the DDRE (AC) directs an organization whose mission is to recognize, explore, and accelerate the development and integration of new technology to maintain U.S. technological superiority. SHARE: Download: Full Size (0.07 MB) Credit: Shaquita McCurdy VIRIN: 190826-D-ZZ999-030.JPG Photo Gallery