Academic Appointment  

• 1998-present. Lecturer of Botany (Genetics and Cytology), Department of Botany,  Faculty of Science, Mansoura University.

•  1997-1998. Assistant lecturer, Department of Botany, Faculty of Science,  Mansoura University.

• 1995-1997. Research and Teaching Assistant, Department of Botany, University of Washington, Seattle, USA. 

• 1991-1995 Assistant lecturer, Department of Botany, Faculty of Science, Mansoura University

• 1987-1991. Demonstrator, Department of Botany, Faculty of Science,  Mansoura University.