Thomas So is a partner of Mayer Brown JSM. He advises on shareholders- and equity-related disputes, property-related litigation, libel litigation and media-related litigation work, and litigation and arbitration in the PRC. He represents banks and financial institutions, property developers and corporations as well as Mainland China enterprises on securities-and equity-related disputes. Thomas has acted as Arbitrator and Mediator in shareholders and other disputes and is on a number of panel of arbitrators in Asia. He has also acted as Deputy Judge at the District Court (18/11/2002-13/12/2002) and Temporary Deputy Registrar at the High Court (8/12/2003-10/1/2004). He is a China-Appointed Attesting Officer (appointed by the Ministry of Justice of PRC). He is the immediate past President of the Law Society of Hong Kong and also a solicitor-advocate with rights to appear in the higher courts in Hong Kong. Thomas was praised by The Legal 500 Asia Pacific 2010/2011 for providing "sound knowledge" and "practical solutions" to clients. Chambers Asia Pacific 2011 describes Thomas is "instrumental in many cross-border cases".