- Demonstrator
, at Faculty of Science, Ain Shams University from 1962 to 1968.
- Lecturer
of Organic chemistry, at Faculty of Science, Ain Shams University from 1968 to 1974.
- Assistant Professor
of Organic Chemistry, at the same Faculty from 1974 to 1979.
- Professor
of Organic chemistry at the same Faculty from 1979 (till now).
- Chem. Expert
: In Science Education Center, Ain Shams University from 1976 to 1994, then from Sept. 1999 to February 2000.
- Chairman
of the Chemistry Dept. from June 1993 , till June 1999.
- Director of
Science Education Center from March 2000.
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