O’Melveny Worldwide

Alvin Sin is a counsel in O’Melveny’s Hong Kong office and a member of the International Disputes and Arbitration, Financial Services, White Collar Defense, and Corporate Investigations Practice Groups.

Prior to joining O’Melveny, Alvin worked for a well-known international law firm in its Hong Kong office, and was also seconded to its Brisbane office.

  • Defending a major contractor in public inquiry, disputes and regulatory investigations arising from a multi-billion dollar rail project
  • Representing Hong Kong-listed companies and their directors and management as well as international insurance brokers in investigations and enquiries by regulators, including the Securities and Futures Commission and the Stock Exchange of Hong Kong
  • Representing a multinational technology and consumer electronics manufacturing company in regulatory enquiries
  • Advising a major investment bank on an internal investigation of a US$75 million investment
  • Advising a major precious metals supplier on anti-money laundering matters
  • Advising an international clothing company on corruption investigations
  • Acting for an Australian-listed entertainment company in its licensing application
  • Advising a major investment bank on state secrets and data protection regarding a securities class action
  • Representing an international insurance company in the sponsorship arrangements for waterfront attraction
  • Acting for a Hong Kong-listed PRC bank in liquidation proceedings brought against a Hong Kong listed company and its subsidiaries by the Securities and Futures Commission in Hong Kong
  • Defending an international investment bank against claims arising from the alleged mis-selling of financial products
  • Representing a Korean-listed major investment bank in a US$50 million dispute arising out of its investments
  • Acting for an international insurance broker in regulatory investigations and legal proceedings
  • Defending an international accounting firm against allegations relating to misfeasance of office holders
  • Advising a Hong Kong public utility company on a multi-million dollar contractual dispute with a supplier
  • Acting for a Hong Kong-listed company in a contractual claim for damages in excess of HK$3.3 billion
  • Representing a PRC company and its majority shareholder in arbitral and court proceedings involving a US$140 million dispute with a global private equity firm
  • Acting for a Korean-listed biopharmaceutical company in various arbitrations involving multiple disputes with its European distributors
  • Representing a multinational chocolate manufacturer in various arbitrations
  • Acting for a PRC environmental consultancy in an arbitration involving a wind farm project in Inner Mongolia
  • Representing a founder of a private equity and alternative investment firm in an arbitration involving a US$1 billion investment dispute
  • Acting for a media company in an arbitration involving investment dispute
  • Representing an Asian investment firm in a US$200 million dispute with a US-listed real estate company
  • Advising an international insurance company on a dispute with an international financial services company arising from the negligence of a professional adviser


  • Cantonese
  • Mandarin


  • Hong Kong


  • University of Cambridge, MA (Cantab) in Law
  • Imperial College London, MEng in Chemical Engineering, Associateship of the City and Guilds of London Institute (ACGI)

Professional Activities


  • Law Society of Hong Kong
  • The Chartered Institute of Arbitrators (CIArb)

Associate Member

  • The Institution of Chemical Engineers (IChemE)

Author (Contributing)

  • The White Book: Hong Kong Civil Procedure


  • Commercial Litigation in Hong Kong: A Practical Guide
  • Arbitration in Hong Kong: A Practical Guide