He is a Chartered Architect (Authorized Person), Chartered Surveyor and also a Barrister-at-Law called to the UK and Hong Kong Bars. Before joining the Hong Kong Polytechnic University, he had worked in industry for over 10 years with practical experience in property development and building control in the UK and Hong Kong. He is currently involved with teaching research and consultancy on urban studies, urban community planning, urban renewal, etc.He has published over 100 international journal papers, and serves as an editorial board member of research journals. He also serves committee members of a number of government committees and professional bodies.