• Demonstrator (Teaching Assistant), Assiut University, Egypt (July 1978).
• Assistant Lecturer, Assiut University, Egypt (April 1983).
• Ph. D. Scholarship in Colorado State University, U.S.A. (October 1984).
• Lecturer, Assiut University, Egypt (Feb. 1989).
• Lecturer, Alexandria University, Damanhour, Egypt (July 1992).
• Assistant Professor, Alexandria University, Damanhour, Egypt (Jan.
1995).
• Associate professor, King Saud University, Riyadh, Saudi Arabia (October
1997)
• Professor, Alexandria University, Damanhour, Egypt (Oct. 2001)
• Head of Agronomy Department, College of Agriculture, Alexandria
Univ., Damanhour, Egypt (Sept. 2002 – April 2012).
• Dean of post-graduate studies and Research, Damanhour Univ., Egypt
(April 2012 - Present).

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