1.   "10th International Conference on Solid State Nuclear Track Detectors", Lyon, France (1979)  

2.    "11th International Conference on Solid State Nuclear Track Detectors", Bristol, U.K. (Sept. 1981)

3.    "International Symposium on Application and Technology of Ionising Radiation", Riyadh, Saudi Arabia (1 2 -1 7 March 1982)

4.     "12th International Conference on Solid State Nuclear Track Detectors", Acapulco, Mexico (Sept. 1983)

5.    "14th International Conference on Solid State Nuclear Track Detectors, Lahore, Pakistan (April 1988)

6.  "First International Workshop on Radon Monitoring in Radioprotection, Environmental Radioactivity and Earth Sciences" held at ICTP, Trieste, Italy (3-14 April 1989)

7.     "Saudi Symposium on Energy, Utilization and Conservation", Jeddah, Saudi Arabia (4 - 7 March 1990)

8.    "15th International Conference of Nuclear Tracks in Solids ", Marburg, Germany (Sept. 1990)

9.   "Second International Workshop on Radon Monitoring in Radioprotection, Environmental Radioactivity and Earth Sciences" held at ICTP, Trieste, Italy (25 Nov. - 06 Dec. 1991)

10.   "16th International Conference of Nuclear Tracks in Solids", Beijing, China (7 - 11 Sept. 1992)

11.   “Regional executive management seminar on radiation processing in industry” in  co-operation with IAEA, 9-13 April 1994, KACST , Riyadh. Saudi Arabia.

12.   “Health and Safety in the Oil and petrochemical Industries”, June-9, 1994. Al-Khobar, Saudi Arabia.

13.    “Second inter. conf. -Laser in Science and Technology “12-16 Aug. 1994, University of Jordan,  Amman.

14.    “18th International Conference of  Nuclear Tracks in Solids ", Cairo, Egypt  (1 – 5, Sept. 1996). 

15.    “19th International Conference of  Nuclear Tracks in Solids ", Besancon, France (31 Aug.- 4 Sept. 1998)

16.    Radiation Protection Course for clinical and hospital staff 19-20 May 1998. Riyadh- Armed Forces Hospital.

17.    “20th International Conference of  Nuclear Tracks in Solids ", Portoroz, Slovenia (28 Aug.- 1 Sept. 2000)

18.    "5th International Conference on High levels of natural radiation and radon areas, radiation dose and health effects" Munich, Sept. 4-7, 2000

19.      Sharjah Solar energy conference, 19-22 Feb. Sharjah, UAE 19-22 Feb. 2001.

20.      First Saudi Science Conference, 9-11 April, KFUPM, Dhahran- Saudi Arabia.2001.

21.     Application of Nuclear Technology In Environment, 24-26 Sept. 2001, Irbid, Jordan

22.    Environmental protection, Indoor radon, Environment and Citizenship- 10-June-2002- Riyadh Saudi Arabia.

23.    The 4th Speciality Conference on Environmental Progress In The Petroleum & Petrochemical Industries. February 23-25, 2004. Bahrain.

24.   Third Middle East Nondestructive Testing Conference and Exhibition 27-30, November, 2005. Bahrain.

25.      NORM courses.    April 21-25, 2006

26.      NORM workshop, 21-22 May 2006. Saudi Aramco

27.    The 5th Speciality Conference on Environmental Progress In The Petroleum & Petrochemical Industries. April 18- 21, 2007. Bahrain.