- 2022 Director of AVIATE Center
- 2015 W. Grafton and Lillian B. Wilkins Professor of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, IL
- 2015 Director of Intelligent Robotics Lab, Coordinated Science Laboratory, University of Illinois at Urbana-Champaign, IL
- 2008 Professor, University Scholar and Schaller Faculty Scholar, Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, IL
- 2008 Research Professor, Coordinated Science Labs, University of Illinois at Urbana-Champaign, IL
- 2008 Affiliate Professor, Department of Aerospace Engineering, University of Illinois at Urbana-Champaign, IL
- 2009 Affiliate Professor, Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, IL
- 2007 Professor, Department of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA
- 2003-2007 Associate Professor, Department of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA
- 2001-2003 Research Scientist II, School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA
- 1998- 2001 Visiting Researcher, School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA
- 1997 Postdoctoral scholar, INRIA (French National Research Institute for Computer Science and Control), Sophia Antipolis, France
- 1992 – 1998 Senior research fellow, Institute of Mechanics, National Academy of Sciences, Yerevan, Armenia