Imam Muhammad ibn Saud Islamic University
Between 1954 and 1976 he worked as a university lecturer in Bengal, becoming a professor, and moved in 1976 to Saudi Arabia to teach Islamic history at Imam Muhammad ibn Saud Islamic University in Riyadh for 12 years, followed by 7 years of teaching at the Islamic University of Madinah. He worked then as a researcher at King Fahd Complex for the Printing of the Holy Qur'an in years 1415–16 AH. He also worked at Dhaka University in 1965–69, at the official Historical Document Centre in 1966–71, and the chief editor for the Historical Society magazine. His university teaching career lasted for more than 40 years.