He authored more than 50 books and many articles in various national and international journals. He was the founding chairman of the Asian Muslim Action Network, director of the Institute of Islamic Studies, and head of the Center for Study of Society and Secularism in Mumbai, where he closely worked with scholar and scientist Professor Dr Ram Puniyani. Engineer was also a supporter of the supporter of the Campaign for the Establishment of a United Nations Parliamentary Assembly, an organisation which campaigns for democratic reformation of the United Nations.