Ronald Sum, JP

Ronald Sum, JP

Baker & McKenzie


Ronald Sum is a partner in Baker McKenzie's Hong Kong office and a member of the Firm's Dispute Resolution Practice Group. He concentrates his practice in all areas of dispute resolution, specializing in 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.

Practice Focus

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. He has extensive experience in handling commercial disputes before the Supreme People’s Court in Beijing.

Professional Associations and Memberships

  • Justice of the Peace, Hong Kong
  • Council member, Law Society of Hong Kong
  • Member, Anti-Money Laundering Committee of the Law Society of Hong Kong
  • Member, Arbitration Committee of the Law Society of Hong Kong
  • Member, Mediation Committee of the Law Society of Hong Kong
  • Council committee member, Hong Kong International Arbitration Centre
  • Panel arbitrator and mediator, Greater Bay Area Arbitration and Mediation Association panel
  • Council member, Hong Kong Mediation Council
  • Council member, Legal Aid Services Council, Hong Kong
  • Board member, Higher Rights of the Audience Board of the Judiciary, Hong Kong
  • Committee member, "Belt and Road" Committee of the Law Society of Hong Kong
  • Committee member, Hong Kong Government Advisory Committee on the Promotion of Arbitration and the Hong Kong Steering Committee on Mediation
  • Appeal panel, Building Rehabilitation Company Registration Scheme, Urban Renewal Authority
  • Council member, Hong Kong Logistics Management Staff Association
  • Vice-Chair, eBRAM International Online Dispute Resolution Centre
  • Legal counsel and trustee, LaSallian Education Council
  • Legal consultant and part-time speaker, Marine Insurance Club
  • Legal consultant and part-time speaker, Hong Kong Association of Freight Forwarders
  • Legal consultant and part-time speaker, Hong Kong Shippers Council
  • Part-time speaker, Hong Kong Federation of Insurers
  • Member, The Ombudsman Hong Kong
  • Member, Hong Kong Insurers Club
  • Member, Hong Kong Shipowners Association
  • Member and part-time speaker, Hong Kong Logistics Council
  • Visiting scholar, Shanghai University of Political Science and Law
  • Visiting scholar, Peking University on Dispute Resolution
  • Part-time lecturer, Master Class at The Chinese University of Hong Kong
  • Ex-Chairman, ICC (Hong Kong) Arbitration and ADR Sub-Committee


  • Hong Kong (1994)
  • England & Wales (1994)
  • New South Wales~Australia (1993)


  • University of Southampton (Diploma of Maritime Studies) (2000)
  • University of New South Wales (Master of Law) (1998)
  • University of Sydney (Bachelor of Law) (1993)
  • University of New South Wales (Bachelor of Commerce) (1990)


  • Cantonese
  • English
  • Mandarin

Author, "Implications of China's Anti-Foreign Sanctions Law on the maritime sector and marine insurance," IUMI Eye, December 2021

Author, "What move will Hong Kong Lawyers make for themselves? A buffet for the legal profession," The Standard, June 2021

Author, "Tokyo Olympics Overseas Fan Ban Adds To Sponsors' Losses And Lawsuits," Forbes, June 2021

Author, "A New Era of Cross-Border Recognition and Enforcement of Arbitral Awards between the Mainland and Hong Kong," Hong Kong Lawyer, February 2021

Author, "A Modified Med-Arb: A proposal to reduce the risk of mis-using confidential information obtained in mediation," The Hong Kong Mediation Council, The Rapport, May 2020

Author, Chapter 2: "Sale and Purchase of Ships and Ship Building" and Chapter 12: "General Average and the York-Antwerp Rules" of Maritime Law and Practice in Hong Kong, 2nd Edition, Sweet & Maxwell, December 2019