1- Demonstrator ( department of Economic
Entomology, Faculty of Agriculture, Alexandria
University, Egypt), 1979.
2- Assistant Lecturer ( department of Economic
Entomology, Faculty of Agriculture, Alexandria
University, Egypt), 1982.
3- Scholarship from Japanese Government for studying Ph D. From 1984 Until 1990.
( Osaka University for foreign Studies and Tokyo University)
4-Assistant Professor (department of Economic
Entomology, Faculty of Agriculture, Alexandria
University, Egypt), 1990.
5- Associate Professor ( department of Economic
Entomology, Faculty of Agriculture, Alexandria
University, Egypt), 1996.
6- Professor (department of Economic
Entomology, Faculty of Agriculture, Alexandria
University, Egypt), 2002
7- Professor of Plant protection( Department of Arid Land Agriculture, Faculty of
Meteorology, Environment and Arid Land Agriculture, King AbdulAziz
University, Kingdom of Saudi Arabia), 2006.