1. Director and Affiliate Associate Professor, The Bridge Engineering Software and Technology (BEST) Center, Dept. of Civil and Environmental Engineering, Univ. of Maryland, College Park, MD 20742.
2. Assistant Professor, Dept. of Civil Engineering, Applied Science Univ., Amman–Jordan; formerly, Research Assistant, The Bridge Engineering Software and Technology (BEST) Center, Dept. of Civil and Environmental Engineering, Univ. of Maryland, College Park, MD 20742.
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Maryland, College Park, MD 20742.
4. Project Engineer, Maryland State Highway Administration,Baltimore, MD 21203.