1. Organizer and researcher Chairman of the session "to study the problems caused by rising groundwater in the city of Jeddah", for the Engineers of the Water and Sewerage Authority western region, March 1987.

2. Organizer and researcher Chairman of the session "to study the problems caused by rising groundwater in the city of Jeddah", for the Engineers of the Water and Sewerage Central region, July 1987.

3. Organizer and researcher Chairman of the session "to study the problems caused by rising groundwater in the city of Jeddah," the Engineers of the Water and Sewerage Authority eastern region, July 1987.

4. Organizer and researcher President of the national scientific session on "the design and maintenance of oxidation ponds and sewerage systems" in collaboration with the Ministry of Municipal and Rural Affairs and the World Health Organization, 7-16 Rabi'II 1412.

5. Organizer and chief researcher for the "re-use of treated Wastewater in agricultural projects" in collaboration with the World Health Organization, 1413.

6. Co-organizer and researcher with the World Health Organization to the "solid waste disposal", December 1990.

7. Assistant coordinator of the symposium on "the best ways to get rid of solid waste," The Ministry of Municipal and Rural Affairs, December 1990.

8. Coordinator of the first Gulf water Symposium, Dubai, United Arab Emirates, 1991.

9. Organizer and researcher Chairman of the symposium "using treated Wastewater in agricultural projects" in collaboration with the World Health Organization and UNICEF and the University College of Ajman, United Arab Emirates, 1994.

10. Organizer and participant in the "technical Wastewater treatment in the warm region" - Water and Sewerage Authority Makkah AlMukarramah region, from 5-16 Safar 1419 approved May 30 - June 10, 1998.

11. Organizer and participant in a "design of reinforced concrete ground water tanks training course", the Water and Sewerage Authority Makkah AlMukarramah Region, 26-30 Shaban 1420 / 4-8 December 1999.

12. Head organizer and researcher at the workshop on "sanitation and the re-use water" Water Research Center, King Abdulaziz University, Sha'ban 1421 / November 2000.

13. Organizer and researcher Chairman of the workshop on "the present and future dams in the Kingdom," Water Research Center, King Abdulaziz University, Wednesday 24/2/1425 e.

14. Organizer and researcher Chairman of the workshop on "bottled water," Water Research Center, King Abdulaziz University, Wednesday 24/8/1426.

15. Organizer and researcher Chairman of the workshop "the side effects resulting from the waste liquid and water floods swamps " dengue "Water Research Center, King Abdulaziz University, Wednesday 22/2/1427 .

16. Vice-President of the Organizing Committee of the Fourth International Conference on 'Ains ( AFLAJ, QANAT,KAREZ), Water Research Center, King Abdulaziz University, 4-6 Rabi'I 1427, 2-4 April 2006.

17. "Satellite Tech-Identification of Groundwater Offshore Springs in Red Sea along Jeddah-Rabigh Coastal Belt; A Case of Fault-Zone- Aquifers in Crystalline Rocks of Arabian Shield”: 5 th International Congress Geotunis-2010 on the use of GIS and remote sensing for sustainable development, organized by Tunisian Association of Digital Geographic Information, held in Tunis, from 29 November to 03 December 2010.

18. "Identification of Groundwater Offshore Springs in Coastal Areas of Red Sea; A Case Study of Satellite Remote Sensing Application": International Seminar on Bridging the Gap through Satellite Technology, organized jointly by Islamic Space Sciences & Technology Network (ISNET), National Authority for Remote Sensing & Space Sciences (NARSS) Egypt, Pakistan Space & Upper Atmospheric Research Commission (SUPARCO), OIC Standing Committee on Scientific and Technology Cooperation (COMSTECH) and Islamic Development Bank (IDB), in Cairo (Egypt) from 19 to 22 October, 2010.

19. Identified Natural Hazards may Cause Adverse Impact on Sustainability of Desalination Plants in Red Sea, Abstract # NH31A-1526, Proceeding of American Geophysical Union (AGU), International Fall Meeting, San Francisco, USA, Available:

http://eposters.agu.org/abstracts/identified-natural-hazards-may-cause-adverse-impact-on-sustainability-of-desalination-plants-in-red-ea/?from_search=true, 2011.

20. Salt-tectonics Plays Major Role in Contributing High Seawater Salinity in Arabian/Persian Gulf: A Constant Constrain on Seawater Desalination: 5 th International Conference on Water Resources and Arid Environments (ICWRAE), organized by Prince Sultan Bin Abdulaziz International Prize for Water (PSIPW) Riyadh, Saudi Arabia from 6 to 9 January 2013