Mr Hui is currently the Deputy Secretary for Health, responsible for formulation of policies on medical services and healthcare system and infrastructure, including matters relating to public health, prevention of communicable diseases, operation and development of public and private hospitals, healthcare financing (including Voluntary Health Insurance Scheme), research and health data as well as genomic medicine development.
Prior to this appointment, Mr Hui was the Deputy Representative of the Hong Kong Economic and Trade Office in Brussels from 2016 to 2020, and the Deputy Secretary for Financial Services and the Treasury (Financial Services) from 2020 to 2023.