The Hon Geoffrey Ma is the former Chief Justice of Hong Kong, having retired from that position in January 2021. He accepts appointments as an arbitrator and a mediator.

Prior to joining the Hong Kong Judiciary, he was in private practice as a barrister at Temple Chambers. He practised mainly in commercial, company and public law, including arbitrations. He was Head of Chambers before his appointment as a Judge of the Court of First Instance of the High Court in 2001. He was elevated to the Court of Appeal in the following year, and appointed Chief Judge of the High Court in 2003. He served as the Chief Justice of the Court of Final Appeal from 2010 to 2021.

He is the Editor in Chief of Arbitration in Hong Kong: A Practical Guide (1^st to 5^th editions). He is also a member of the International Advisory Board of the Hong Kong International Arbitration Centre, on their Panels of Arbitrators and Mediators, and is also on the Panel of Arbitrators of the Singapore International Arbitration Centre. He is also a door tenant of Brick Court Chambers, London and has offices in Singapore.