1. Ph.D. Student, Dept. of Civil, Construction, and Environmental Engineering, Iowa State Univ., Ames, IA.
2. Staff Engineer, Terracon Consultants, Inc., Franklin, WI.
3. Postdoctoral Research Associate, Dept. of Civil, Construction, and Environmental Engineering, Iowa State Univ., Ames, IA.
4. Professor, Dept. of Civil, Construction, and Environmental Engineering, Iowa State Univ., Ames, IA.
5. Associate Professor, Dept. of Civil and Environmental Engineering, Michigan State Univ., East Lansing, MI.