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