!__National and International Appointments__
* (2018 – Present)  Adjunct Professor, The National University of Malaysia, Malaysia
* (2012 – Present)  Visiting Professor, Shanghai Medical College, Fudan University, China 
* (2010 – Present)  Senior Clinical Fellow, University of Melbourne, Australia
* (2010 – 2014)	 Honorary Gastroenterologist, St Vincent's Hospital, University of Melbourne, Australia
* (2009 – 2010)	 Locum Consultant Gastroenterologist, Chelsea and Westminster Hospital, London, UK
* (2003 – 2009)	 Specialist Registrar, North West London Hospitals (St Mary’s Hospital, St Mark’s Hospital, Northwick Park Hospital, Hillingdon Hospital), UK
* (2001 – 2003)	 Senior House Officer, King College Hospital & The Whittington & Middlesex Hospitals, UK
* (2000 – 2001)	 House Officer, St Bartholomew Hospital London, UK

!__Professional Societies__
* (Since 2024) President, The Hong Kong Society of Gastroenterology
* (Since 2024) Advisory Board Member, Asian Organization of Crohn's and Colitis (AOCC)
* (Present) Associate Editor, ''Gut''
* (Present) Advisory Board, ''Cell Host & Microbe''
* (Present) Board Member, ''Cell Genomics''
* (Since 2017) Steering Committee, World Gastroenterology Organization (WGO)
* (Since 2011) Management Committee, International IBD Genetics Consortium 




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