1. Graduate Research Assistant, Department of Civil, Construction and Environmental Engineering, The University of Alabama, Tuscaloosa, AL
2. Postdoctoral Research Associate, Alabama Transportation Institute, The University of Alabama, Tuscaloosa, AL
3. Assistant Professor, Department of Civil, Construction and Environmental Engineering, The University of Alabama, Tuscaloosa, AL
4. Visiting Research Scholar, Alabama Transportation Institute, The University of Alabama, Tuscaloosa, AL