1. Sr. Pavement Engr., Pavement Consultancy Services, Div. of Law Engrg., 4700 Berwyn House Road, Suite 202, College Park, MD 20740
2. Assoc. Prof., of Civ. Engrg., Univ. of Maryland, College Park, MD 20742
3. Prof. of Civ. Engrg., Univ. of Maryland, College Park, MD
4. Prin. Engr., Petra Geotechnical, Inc., 3185‐A Airway Avenue, Costa Mesa, CA 92626; formerly, Sr. Proj. Engr., The Earth Tech. Corp., 275 West Hospitality Lane, Suite 200, San Bernardino, CA 92408