Associate Professor of Biomedical Engineering, Faculty of Engineering, Cairo University, Giza, Egypt  – Dec. 2003:Present.

Director of Research, International Biomedical Engineering Technologies (IBE Tech), Giza, Egypt – July 2004:Present.

Research Associate at Emory University/Georgia Institute of Technology Department of Biomedical Engineering, Atlanta, Georgia, U.S.A. – July 2002:July 2004.

Assistant Professor of Biomedical Engineering, Faculty of Engineering, Cairo University, Giza, Egypt – September 1998:September 2003.

General Manager/Director, Research and Development, International Electronics – Biomedical Division, Cairo, Egypt – August 1998: Dec. 2002.

Post-Doc Associate, Center for Magnetic Resonance Research, Department of Radiology, University of Minnesota Medical School, Minneapolis, Minnesota – Feb. 1998:July 1998.

Visiting Research Professor, Electrical Engineering Department, University of Louisville, June 1997:Feb. 1998.

Research assistant, Department of Radiology, University of Minnesota Medical School, Minneapolis, Minnesota – Aug. 1996: June 1997.

Research Assistant, Department of Engineering Math and Computer Science, University of Louisville, Jan. 1993-August 1993.

Lecturer assistant, Systems and Biomedical Engineering Dept., Cairo University, Cairo, Egypt – 1989:1998 (on-leave of absence between 1993-1998 for Ph.D. study and post-doc training)

Consultant, International Electronics-Cairo and Universal Sonics (Now DRS)-New Jersey for BIO-CALC package development on VLCUS-1000 ultrasound machine – Feb. 1994: Oct. 1995

Senior Design Engineer, WISSAM Electronic Design and Manufacturing, Cairo, Egypt - May 1991:Jan. 1993.

Junior Biomedical Engineer, summer internship in U.S. Naval Medical Research Unit 3 (NAMRU-3), Cairo, Egypt - 1988.

Junior Biomedical Engineer, summer internship in Arab Contractors Medical Center, Cairo, Egypt - 1987.