 Professor of Computer Engineering, College of Engineering and Technology, Arab Academy for Science and Technology (AAST), 1/1/2015 till now.  Computer Engineering Department Head, College of Engineering and Technology, Arab Academy for Science and Technology (AAST), 9/1/2012 -1/1/2015.  Professor of Computer Engineering, College of Engineering and Technology, Arab Academy for Science and Technology (AAST), 1/1/2006 -1/1/2012..  Dean Ass. Of Information Technology, College of Engineering and Technology, Arab Academy for Science and Technology (AAST), 9/1/2003 -1/1/2006.  Computer Engineering Dept. Head, College of Engineering and Technology, AAST Cairo Branch, 9/1/2001-1/9/2003.  Computer Science Dept. Head, Computer Science Dept., AAST QATAR Branch 9/1/1998 – 6/30/2001.  First lecturer, Computer Science Dept., Computer Science Dept., AAST QATAR Branch 9/1/1997 – 9/1/1998.  First lecturer, Computer Engineering Dept., AAST Alexandria 10/1/1993 – 9/1/1997.  Ass. Prof. of Computer Science/Engineering at College of Technology, ABHA, Saudi Arabia 9/1/1989 – 6/30/1993  From June 1970 to February 1989 I worked at Egyptian Air Force as Officer Engineer. I resigned in February 1989. At that time, I was the Basic Engineering department Head at the Egyptian Air Force Academy.