• 高等法院暂委法官（2017年7月31日至2017年9月1日）
• 私营骨灰龛上诉委员会副主席（2017年至今） 
• 暴力及执法伤亡赔偿组成员（2017年至今）
• 保险上诉审裁处成员（2017年至今）
• 市政服务上诉委员会副主席（2016年至今）
• 香港证监会非执行董事（2014年至今）
• 香港税务上诉委员会副主席（2015年至今）
• 香港保险业联会上诉委员会成员（2014年至今）
• 英国特许仲裁司学会会员
• 香港中文大学法律学院金融规管与经济发展研究中心特聘研究员
• 香港大律师公会仲裁委员会主席
• 律政司仲裁推广咨询委员会成员
• 香港大律师公会中国业务发展常委会副主席（2014 – 2016）
• 英国衡平大律师协会海外会员（2011年至今）
• 香港大律师公会律师资格考试委员会委员（2006年至今）
• 香港大律师公会内地事务委员会委员（2005年至今）
• 香港中殿学院协会顾问（1999年至今） 

• Re China Medical Technologies, Inc. [2014] 2 HKLRD 997 - A leading case on the jurisdictional limits of lexi fori in a cross-border insolvency situation.
• Mo Ying v. Brillex Development Limited and Another [2014] 3 HKLRD 224 – a leading case on the applicable legal principle of common intention constructive trust.
• Securities and Futures Commission v. Tiger Asia Management LLC and Others (2013) 16 HKCFAR 324 – A leading Court of Final Appeal decision on the jurisdiction limit of Section 213 of the Securities and Futures Ordinance, Cap.571
• Re Raymond Lee Cho Min and Lee Priscilla Hwang [2012] 4 HKLRD 581 – a decision which set out the judicial approach to the application of Section 29 of the Bankruptcy Ordinance, Cap.6
• Re Tan Sri Datuk Lau Gek Pok alias Lau Gek Poh [2012] 5 HKLRD 75 – a leading case on DNA test in a probate context.
• Hallmark Cards Incorporated v Yun Choy Ltd (in Compulsory Liquidation) and Another [2012] 1 HKLRD 396 – a case on the priority of trusts claims in an insolvency regime.
• Top One International (China) Property Group Co Ltd and Another v. Top One Property Group Ltd and Others [2011] 1 HKLRD 606 – commercial disputes involving the legal principles on unless order and extension of time under the new CJR rules.
• Sunlink International Limited (Provisional Liquidators Appointed) &Ors v. Wong Shu Wing &Ors [2010] 5 HKLRD 653
  Leading case on shareholders’ right to vote in an insolvency situation.
• Hang Fung Jewellery Company Limited [2010] 2 HKLRD 1.
  It establishes the retention of property right via a trust mechanism in the case of an insolvency.
• Re PCCW Ltd [2009] 3 HKC 292
  It sets out the legal principles for the sanction of a scheme of arrangement and the problem with split voting.
• Securities and Futures Commission v C-F [2009] 4 HKC 167; Securities and Futures Commission v. A [2008] 1 HKC 89
  It establishes the legal principles and jurisdiction of the Court to grant interlocutory injunction under section 213 of the Securities and Futures Ordinance, Cap.571
• Waddington Ltd v. Chan Chun Hoo Thomas & Others [2006] 2 HKLRD 896
  It first establishes the availability of multi-derivative action in Hong Kong and the relevant applicable legal principles.
• MakSik Bun & Others v. Mak Lei Wun& Others [2005] 4 HKLRD 328
  A contentious shareholder’s disputes which sets out the ambit and limits of Section 168A of the Companies Ordinance, Cap.32
• Flying Mortgage Ltd v. Chan KuenKwong& Others [2010] 1 HKLRD 318
  It establishes and applies the principles of resulting trust in the context of a repossession action by a mortgagee.

For a more complete list of cases in which Mr William Wong S.C. appeared as counsel, please visit the Judiciary Website at http://legalref.judiciary.gov.hk/lrs/common/ju/judgment.jsp; where you can access the list by using the advanced search function.

• Co-authored "Company Law: Powers & Accountability - 2nd Edition" (2017) with Kerby Lau and Dato Loh Siew Cheang
• Co-authored one of the leading Hong Kong text on company law: “Company Law – Powers & Accountability.” (2003). The book was translated into Chinese in 2005 - «公司法 – 权力与责任», 法律出版社
• One of the editors of Hong Kong Civil Procedure 2001 and Hong Kong Civil Procedure 2002