1. Consultation Department, Consultant at Dwam Medical, Riyadh, KSA
2. Faculty of Biotechnology, MSA University, 6th of October City, Egypt
3. Civilian Human Resources, Riyadh Region Police, Public Security, Ministry of Interior, Riyadh, KSA
4. Scientific Division, Algharraa Private School, Almadinah Almonawarah, KSA
5. Physics Department, College of Sciences, Umm Al-Qura University, Makkah, KSA
6. Physics Department, Al-Hussein Bin Talal University, Ma'an, Jordan
7. Physics Department, Al-Qunfudah University College, Umm Al-Qura University, Makkah, Saudi Arabia