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.