1. Visiting Research Assoc.; Faculty of Applied Sci., Univ. of British Columbia, Vancouver, Canada and Sr. Lect., Civ. Engrg. Dept., Univ. of Auckland, Auckland, New Zealand
2. Prof. of Civ. Engrg.; Univ. of California, Berkeley, Calif
3. Prof. and Dean; Faculty of Applied Sci., Univ. of British Columbia, Vancouver, Canada