1. Senior Staff Engineer, Geosyntec Consultants, 1255 Roberts Boulevard NW, Suite 200, Kennesaw, GA 30144.
2. Rapp Foundation Presidential Professor, Univ. of Oklahoma, School of Civil Engineering and Environmental Science, 202 West Boyd St., Norman, OK 73019.
3. Lecturer, Univ. of Massachusetts, Dept. of Chemical Engineering, 159 Goessmann Laboratory, 686 North Pleasant St., Amherst, MA 01003.