- First International conference, solar energy storage and applied photochemistry organized by Ain Shams University, Cairo, Egypt, 6 -11 Jan. 1991.
- Chemistry and Developing Countries, organized by the Royal Society of Chemistry, Imperial College, UK, 6-8 April 1991.
- Inorganic Chemistry is good for you, organized by the Royal Society of Chemistry, University of Reading, UK, March 1992.
- Macrocyclic Ligands for the design of new materials, IUPAC, organized by the European Latin American Research Group, University of Surrey, UK, 14-16 September 1992.
- Second International conference, solar energy storage and applied photochemistry organized by Ain Shams University, Egypt, 6 -11 Jan. 1993.
- 1993 Autumn meeting organized by the Royal Society of Chemistry, University of Warwick, UK, 21 - 23 September 1993.
- First International Conference on University - Industry Interaction (ICUII 94) organized by Mansoura University, Cairo, Egypt, 22 - 24 March 1994.
- Third International conference, solar energy storage and applied photochemistry organized by Ain Shams University, Cairo, Egypt, 6 -11 Jan. 1995.
- “Fifth Ibn Sina International Conference on pure and Applied Heterocyclic chemistry”, organized buy Ain Shams University 9 -12 December 1995.
- “Fourth International Conference on Vitamin B12 and B12 proteins”, Innsbruck, Austria.1-6 September 1996,
- Fourth International conference, solar energy storage and applied photochemistry organized by Ain Shams University, Cairo, Egypt, 1 - 6 January1997.
- 15th International Conference on Chemical Education organized by IUPAC and Ain Shams University, 9-14 August 1998.
- “Fifth International Conference on Vitamin B12 and B12 proteins”, Marburg, Germany, September 2000.
- Inorganic reaction mechanism meeting, Dalton Division, organized by the Royal Society of Chemistry, Kloster Banz, Germany, January 2002.
- Third Arab conference on Systemic approach in teaching and learning, organized by Ain Shams University, Cairo, April 2003.