Honourable Justice A. Mustapha is a former Chief Judge of the Federal High Court of Nigeria, he retired in 2009. He was at various times a Chief Magistrate, Honourable Attorney General and Commissioner for Justice of Niger State.

He is a member of the World Jurist Association, International Bar Association and has received both National and International Awards including an award as the Officer of the Federal Republic (OFR). He is also a fellow of the Chartered Institute of Arbitrators.