Intern (2006–2007): Benha University Hopsitals, rotating through general medicine, pediatrics, OB/GYN, general surgery, anesthesiology, emergency medicine, cardiology, clinical pathology and blood bank departments.

Resident (2007–2010): in cilnical and chemical pathology department and blood bank, Benha University Hopsitals, rotating through haematology, clinical chemistery, microbiology, immunology units and blood bank.

Specialist and assistant lecturer (June 2010–January 2015): of clinical pathology and immunology, Benha University Hospitals, Benha University, Egypt.

Doctoral researcher (Jan. 2013-Dec. 2013): in the genetics group, Lübeck Institute of Expermintal Dermatology (LIED), University of Lübeck, Germany.

Senior specialist and lecturer (March 2015 till now): of clinical pathology and immunology, Benha University Hospitals, Benha University, Egypt.