1. The Second Iranian Congress of Civil Engineering, Shiraz, Iran, May 1979.
2. The 13th Annual Meeting of the Society of Engineering Science, Hampton, Virginia, U.S.A., November 1976.
3. The International Conference on Housing Problems in Developing Countries, University of Petroleum and Minerals, Dhahran, Saudi Arabia, December 1978.
4. The International Symposium on Computational Methods in Non-linear Structural and Solid Mechanics, Washington, D.C., USA, October 1980.
5. The International Symposium on Hybrid and Mixed Finite Element Methods, Atlanta, Georgia, USA, April 1981.
6. Symposium on the Degradation of Materials in Various Environments, King Abdulaziz University, Jeddah, Saudi Arabia, May 1981.
7. Symposium of the Faculty of Arab Universities, King Saud University, Riyadh, Saudi Arabia, February 1983.
8. Symposium on Concrete and Concrete Structures in the Middle East, King Saud University, Riyadh, April 1987.
9. Save the Environment Conference, Beirut, Lebanon, November 1995.
10. 6th Saudi Engineering Conference, KFUPM, Dhahran, December, 2002.