| Working group for development of a risk calculator for chronic hepatitis B, Asian Pacific Association of the Study to the Liver (APASL) | |
| Working Group for establishment of the Hong Kong Society of Child Neurology & Developmental Paediatrics | |
| Working Group for Preparation of Guidelines on Sedation for Dental Procedures in Pediatric Patients | |
| Working Group for review of Training Regulations and Guidelines in Clinical Oncology, Hong Kong College of Radiologists | 2017-Now | Honorary Secretary | | |
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| Working group for simulation center set-up, Hong Kong Academy of Medicine | 12-13 | College represenative | | |
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| Working Group Member, Interest Group on Cavern Engineering in Hong Kong, The Hong Kong Institution of Engineers | 2002 – today | Executive Member | | |
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| Working Group Member, Review of Blasting Data and Practice in Hong Kong, The Hong Kong Institution of Engineers | 2003 – today | Executive Member | | |
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| Working Group of the 3rd Asia Maudsley Fourm organised by the Hong Kong College of Psychiatrists in collaboration with the Institute of Psychiatry, King’s College London | |
| Working group of the Food and Health Research Centre | 02/2001-till now | External member | | |
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| Working Group on Award for Quality in Service & Management | |
| Working Group on Cancer Rehabilitation Committee | 2002-present | Committee Member | | |
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| Working Group on Clinical Guidelines and Evidence-based Medicine, QA Sub-committee in Paediatrics | |
| Working Group on Development and Implementation of a CIC Carbon Assessment Tool, Construction Industry Council | |
| Working Group on Diet and Physical Activity, Department of Health | |
| Working Group on Diploma of Community Gynaecology, Hong Kong College of Obstetricians and Gynaecologists | |
| Working Group on Elder Abuse, Social Welfare Department | 4/ 2018- 12/2023 | Appointed member | | |
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| Working group on HKCOS Positional Statement in the Management of Osteoarthritis of Knee, HKCOS | 01/2022 - 12/2022 | Chairman | | |
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| Working Group on Hong Kong Genome Project | |
| Working Group on Hong Kong Genome Project, Food and Health Bureau, Hong Kong | |
| Working Group on post-graduate training in clinical neuroscience, HK College of Psychiatrists | |
