After leaving his diplomatic position as the Cultural Attaché of the Arab League, Haddara devoted his time to the academic field.

Haddara held the positions of dean of the Faculty of Arts, Tanta University, and vice dean for post-graduate studies, Faculty of Arts, Alexandria University.

Haddara authored one historical novel called El mansoura, named after the Egyptian city El-Mansoura, and a total of 16 books in the field of Arabic literature and criticism.

Haddara edited numerous books, and translated 5 books to Arabic language including Islam by the Arabist scholar Alfred Guillaume, and the Japanese Hiroshima Diary by Michihiko Hachiya.

He also wrote numerous articles in national and international academic journals, conferences, magazines, and newspapers.