Principal Senior Technical Fellow & Chief Scientist of Hypersonics, The Boeing Company
Program Manager, Tactical Technology Office, Defense Advanced Research Projects Agency
Distinguished Member of the Technical Staff, Sandia National Laboratories
Director, Analysis Engineering, Northrop Grumman Corporation
Owner/CEO, Metis Materials
Special Scientific Advisor, Office of the Under Secretary of Defense for Research & Engineering
Corporate Chief Engineer for Hypersonics, Lockheed Martin
Head, Air and Missile Defense Sector, Johns Hopkins University Applied Physics Laboratory