· Director, Center of Autonomous Vehicles In Air Transportation Engineering (AVIATE) (Current)2022–
· Co-founder And Chief Scientist, IntelinAir2015–
· W. Grafton And Lillian B. Wilkins Professor Of Mechanical Science And Engineering, University of Illinois at Urbana-Champaign2008–
· Professor, Virginia Tech2003–2008
· Research Scientist, Armenian Academy of Sciences1992–1998
· Optimal control, Institute of Applied Mathematics, Russian Academy of Sciences, Moscow, Russia1988–1992