Mr Wong is now Deputy Director of Public Prosecutions put in charge of the Commercial Crime and Corruption Unit of the Prosecutions Division at the Department of Justice, Hong Kong and appears regularly in courts at various levels. He read law at the University of Hong Kong and was called to the bar in 1993.

During the course of his almost 20 years' legal career, Mr Wong has been posted to various parts of the Department handling cases very different in nature, including trials and appeals (both criminal and civil), judicial reviews, habeas corpus applications, insider dealing inquiries and disciplinary hearings. He also attends proceedings before the Legislative Council in the promotion of government bills and has over 15 years' experience as Assistant Returning Officer (Legal) at elections. He only ceased to be a member of the High Court and the Court of Final Appeal Rules Committees in 2011.

Mr Wong obtained his LLM (with distinction) in 1996 and is an accredited mediator of the London-based Centre for Effective Dispute Resolution. He has also been a contributing editor to Archbold Hong Kong since its inception in 2004.