· Director, Georgia Tech Vertical Lift Research Center Of Excellence, Georgia Institute of Technology2018–
· Director GT Vertical Lift Research Center Of Excellence And Professor, Daniel Guggenheim School Of A, Georgia Institute of Technology2018–
· Associate Director, Georgia Tech Vertical Lift Research Center Of Excellence, Georgia Institute of Technology2015–
· Professor, Georgia Institute of Technology2013–
· Associate Professor, Georgia Institute of Technology2004–2013
· Assistant Professor, Georgia Institute of Technology1997–2004
· Senior Research Engineer, Georgia Tech Research Institute1994–1997
· Research Engineer II, Georgia Tech Research Institute1990–1994
· Member Technical Staff III, Boeing-Mesa (McDonnell-Douglas Helicopter Company)1988–1990
· Associate Scientist, Lockheed Martin1985–1988
· Senior Flight Test Engineer, Lockheed Martin1982–1985