Dr. Stewart developed from scratch, managed, and had profit and loss responsibility for a $150 million operation of 500 technical and administrative staff with major locations in the US at Arlington, Virginia; Tucson, Arizona; Saint Petersburg, Florida; Chantilly, Virginia; Sterling, Virginia; Ann Arbor, Michigan; Patuxent River, Maryland; and Lihue, Hawaii. He personally was responsible for starting most of those offices. In addition, he had a small operating location in Cambridge, UK. He worked closely with DARPA, Federal Bureau of Investigation (FBI), NGA, ONR, NRO, AFRL, NAVAIR, Air Force Office of Scientific Research (AFOSR), and Army Night Vision and Electronic Systems Directorate (NVESD) in the advanced unmanned aerial vehicle (UAV), communications system, advanced sensor system, sensor signal/image exploitation, biometrics, and advanced information technology areas. He was Chairman of DARPA Sensor Technology Office (STO) High Performance Embedded Processor Study, a member of the DARPA Tier II Plus/Global Hawk UAV Concept Development Team, Chairman of the DARPA Semi-Automated Imagery Intelligence (IMINT) Processor Red Team, and a member of the DARPA Synthetic Aperture Radar (SAR) ECCM Study. He had a contract with Taiwan to develop a UAV mission planning system.