In the 1970s he worked with the Libyan Foreign Ministry as translator-editor. In the 1980s he was with the London-based
The Muslim Institute, running their MuslimMedia newsservice and other publications. The Muslim Institute went on to form the
Muslim Parliament, an informal body of leading British Muslims. He is the author or translator of over 50 books in Arabic, English and Urdu including "Hijrah in Islam" (Delhi, 1996) and
Palestine Documents (New Delhi 1998). He has contributed eight articles to the Encyclopaedia of Islam (Leiden) on Indo-Muslim themes. He is a regular commentator on Islamic and South Asian issues on radio and TV channels, including
Al Jazeera and
BBC Arabic and his writings appear in Arabic newspapers and magazines. In 2000, Khan started
Milli Gazette, an English language fortnightly
compact newspaper. In December 2007, he was elected for a two-year term (2008–2009) as President of the
All India Muslim Majlis-e-Mushawarat, the umbrella body of Muslim organisations in India. He has also been elected as the President of AIMMM for 2012 and re-elected for a further two-year term (2014-2015). In an interview to rediff.com he claimed there is "no tangible proof of Muslims' involvement in terrorism" in India. In July 2017, he was appointed as Chairman for a three-year term of Delhi Minorities Commission, a quasi-judicial body to take care of the welfare and interests of the designated minorities in the Indian capital region. As chairman, Khan formed a fact-finding committee to report and suggest recommendations to
Delhi Government about the
2020 Delhi riots. In October 2023, he published
The Glorious Quran, an English translation of
Quran, the holy book of Muslims. ==Sedition Case==