Dr Cheng is the Consultant of a law firm, after having served as its Senior Partner for over 20 years. His areas of practice cover capital markets, corporate governance, regulatory, and compliance. He has been actively contributing to the community and is currently a member of the Financial Leaders Forum. He has also served in various important positions, including Chairman of the Education Commission, government-appointed Director on the Board of Hong Kong Exchanges and Clearing Limited, and founding Vice-Chairman of the Estate Agents Authority.