Ms Cheung is the Managing Partner and the Head of Audit of KPMG Hong Kong. She was the Past President of the Hong Kong Institute of Certified Public Accountants. She currently serves as member of various public service committees, including the Standing Committee on Disciplined Services Salaries and Conditions of the Service and the Transport Advisory Committee. Apart from being a member of the Advisory Committee, the Honorary Advisory Panel and the Inspection Committee of the Financial Reporting Council, she is the Director of Hong Kong Cyberport Management Company Limited and Insurance Authority.
Ms Cheung has served as Member of the Air Transport Licensing Authority, the Financial Reporting Review Panel, the Independent Commission on Remuneration for Members of the District Councils of the HKSAR, the Non-local Higher and Professional Education Appeal Board, the Occupation Retirement Schemes Appeal Board and the Securities and Futures Appeals Tribunal.