in the Hematology Unit, Clinical Pathology department, NCI, Cairo University, 1994-1997.
in the Bone Marrow Transplantation (BMT) Laboratory Unit, Clinical Pathology Department, NCI, Cairo University, 1997- 2001.
in the BMT Lab Unit, NCI,CairoUniversity, from Marsh 2002.
in the BMT Lab Unit, NCI, Cairo University, from September 2007 till October 2014.
in the BMT Lab Unit, NCI, Cairo University, from November 2014 till present time
at Nasser Institute for Health and Research since December 2005 till present time.
hemato-oncology,SheikhZayedSpecializedHospital,Cairo.