Dr Thomas So is a partner of Grandall Zimmern Law Firm.  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 was the President of the Law Society of Hong Kong (6/2016 – 6/2018) and is 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". Thomas speaks English, Cantonese and Mandarin.

Ronald concentrates his practice in all areas of dispute resolution, specializing in digital financial disputes and China related matters, cross border disputes, complex commercial disputes, regulatory bodies investigations, sports related disputes, transportation (maritime, aviation, road and rail), international trade, insurance and reinsurance including export credit insurance, product liability and product recall, including arbitration, litigation, mediation and investigations.

Ronald is qualified as a solicitor in Hong Kong, England and Wales and Australia. He is a fellow member of the Hong Kong Institute of Arbitrators and the Chartered Institute of Arbitrators. He is the immediate past chairman of the International Chamber of Commerce: Arbitration and ADR Sub-Committee. He is also the council and appointments committee member of the Hong Kong International Arbitration Centre. In addition to being a member of the panel of arbitrators with various institutions, Ronald has acted both as counsel and arbitrator in administered arbitration proceedings including the ICC, HKIAC, LMAA, CIETAC, SCIA, SIAC, THAC, GAFTA/FOSFA etc. He has conducted arbitration matters in Hong Kong, China, London, United States, Australia and Singapore. Ronald is also an accredited mediator of HKMAAL, CIETAC and the Law Society of Hong Kong. Ronald has recently be appointed as an Investor State Mediator under the Mainland and Hong Kong Closer Economic Partnership Arrangement (CEPA). Ronald is a council member of the Hong Kong Mediation Council. He also sits on the Hong Kong Government Advisory Committee on the Promotion of Arbitration and the Hong Kong Steering Committee on Mediation. He is a member and chairman of the Public Education and Publicity Sub-committee. Ronald recently passed the examination for Hong Kong legal practitioners to practise law in the Greater Bay Area in the People’s Republic of China. Ronald is also the Vice-Chairman of the eBRAM International Online Dispute Resolution Centre. He has extensive experience in handling digital and commercial disputes.