1. Asst. Prof. of Civ. Engrg., Solid Mech. Div., Univ. of Waterloo, Waterloo, Ontario and currently Visiting Res. Assoc., Dept. of Civ. Engrg., Div. of Struct. Engrg. and Struct. Mech., Univ. of California, Berkeley, CA
2. Prof. of Civ. Engrg., Solid Mech. Div., Univ. or Waterloo, Waterloo, Ontario, Canada