1. Postdoctoral Research Associate, Dept. of Civil Engineering, Univ. of Texas at Arlington, Arlington, TX.
2. Associate Transportation Researcher, Texas A&M Transportation Institute, Dallas, TX.
3. Associate Professor, Dept. of Civil Engineering, Univ. of Texas at Arlington, Arlington, TX.
4. Professor, Dept. of Industrial Engineering, Univ. of Texas at Arlington, Arlington, TX.
5. Office of Strategic Initiatives, City of Arlington, Arlington, TX.