He has 35 years of experience in the anti-corruption field. He joined the Hong Kong Independent Commission Against Corruption (ICAC) shortly after its inception in 1975 and was its Deputy Commissioner from 1996 to 2002. Since his retirement in 2002 he participated in 160 missions to share his anti-corruption expertise. In particular, he assisted a number of countries in setting up their new anti-corruption agencies, including Mongolia, Cambodia, Serbia, Mauritius and Timor Leste. He is a member of the UNODC Anti-corruption Expert Group (2006), Regional Coordinator (Asia) of the International Association of Anti-Corruption Authorities; Honorary Anti-Corruption Advisor to the Office of the Ombudsman of the Philippines and the Mongolian Independent Authority Against Corruption; Visiting Professor of the National Prosecutors College in PRC. He is also the Immediate Past Chairman of the Chartered Management Institute, Hong Kong Branch.
Tony Kwok is Adjunct Professor and Honorary Course Director at the Hong Kong University and assisted, there, in designing the world's first International Postgraduate Certificate Course in Corruption Studies. From this same university, he received the "Outstanding Teacher Award" in 2006.