1. Graduate Research Assistant, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC.
2. Assistant Professor, Dept. of Civil Engineering, King Saud Univ., Riyadh, Saudi Arabia.
3. Associate Professor, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC.
4. Associate Director of Research (CSRA), Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado Boulder, Boulder, CO.