-Demonstrator, Food Science Department, faculty of Agriculture, Ain Shams University, 1981.
- Assistant Lecture, Food Science Department, faculty of Agriculture, Ain Shams University, 1987.
- Lecture, Food Science Department, faculty of Agriculture, Ain Shams University, 1998.
- Associate Professor, Food Science, Ain Shams University, Cairo, Egypt.2006
- Professor, Food Science, Ain Shams University, Cairo, Egypt.
Work field:
Characteristic of milk clotting enzyme; Functional properties of protein; Modification of milk protein; Peptide and amino acids of milk protein.