2001- Present Professor of Endemic Medicine and Gastroenterology – Faculty of Medicine, Cairo University.
2001- Present Director of Clinical Research Unit, Hepatitis C Project – International Health Division, University of Maryland.
1997- Present Director of the ultrasound training program – Egyptian Medical Syndicate.
1984- Present Active member of Ultrasonography Unit – Faculty of Medicine, Cairo University.
1984- Present Active member of Endoscopy Unit – Faculty of Medicine, Cairo University.
1997-2002 Executive manager of Liver Center Unit – Cairo University.
1995-2001 Assistant Professor of Endemic Medicine and Gastroenterology Consultant – Faculty of Medicine, Cairo University
1994-1997 Consultant of Gastroenterology: DR Soliman Fakeeh Hospital (480 beds) – Jeddah, Saudi Arabia