Demonstrator in the Department of Mathematics, Faculty of Science, Benha University, Egypt, 2003.

Assistant Lecturer in the Department of Mathematics, Faculty of Science, Benha University, Egypt, 2007.

Lecturer in the Department of Mathematics, Faculty of Science, Benha University, Egypt, 2012.

I am a referee in the following international journals:---------------------------- ------------------------------------------------------------------------------------------------ Abstract and Applied Analysis, Hindawi Publishing Corporation