Paul Leung was called to the Bar of England and Wales in 1985 and the Hong Kong Bar in 1986. He was a Crown Counsel/Senior Crown Counsel for 9 years with the Prosecutions Division of the then Attorney General's Chambers (now Department of Justice). He commenced private practise in 1994 specialising in criminal matters including appeals.
He is one the legal advisers to the Hong Kong Chinese Civil Servants’ Association.