1. Postdoctoral Research Associate, Center for Underground Infrastructure Research and Education, Dept.of Civil Engineering, Univ. of Texas at Arlington, Arlington, TX.
2. Professor and Director, Center for Underground Infrastructure Research and Education, Dept. of Civil Engineering, Univ. of Texas at Arlington, Arlington, TX.
3. Doctoral Candidate, Center for Underground Infrastructure Research and Education, Dept. of Civil Engineering, Univ. of Texas at Arlington, Arlington, TX.
4. Engineer in Training III, Alan Plummer Associate, Inc., Fort Worth, TX.