Before joining the University of Memphis, he worked as a research assistant professor at the National Center for Smart Growth Research and Education, University of Maryland College Park. He is involved with a number of national and state transportation projects from Federal Highway Administration, U.S. Department of Transportation, Maryland State Highway Administration, Maryland Department of Transportation, and Michigan Department of Transportation. His areas of expertise include Travel Demand Modeling, Transportation Planning, and Policy, Econometric Modeling, Transportation Economics, and Finance. He is a member of Transportation Economics Committee (ABE20) and Freight Transportation Economics and Regulation Committee (AT010) of the Transportation Research Board.