- Consultant Surgeon in Department of Surgery and Advisor of Minimal Access Surgery Training Centre, Pamela Youde Nethersole Eastern Hospital
- HKEC Training Centre for Healthcare Management & Clinical Technology
- Honorary Consultant in General Surgery and Director of Minimally Invasive & Robotic Surgery Development, Hong Kong Sanatorium & Hospital

Offices Held

• President, Asia Endosurgery Task Force
• Secretary General / Treasurer,
  International Federation of Societies of Endoscopic Surgeons (IFSES)
• Member of Board of Governors,
  Society of Endoscopic & Laparoscopic Surgeons of Asia (ELSA)
• President, Hong Kong Society for Coloproctology
• Council Member, Hong Kong Society of Digestive Endoscopy
• Council Member, Hong Kong Society of Minimal Access Surgery
• Editorial Board, Annuals of the College of Surgeons of Hong Kong
• Associate Editor, Asian Journal of Endoscopic Surgery (AJES)

Appointments

• Hunterian Professor, Royal College of Surgeons of England (2009-10)
• Honorary Consultant in Surgery, Queen Elizabeth Hospital NHS Trust, London, UK
• Honorary Consultant in Surgery, Royal Free Hospital, London, UK
• Honorary Consultant in Laparoscopic Surgery,
  Guangzhou Medical College First Affiliated Hospital
• Honorary Consultant, Shenzhen Hospital of Beijing University
• Honorary Consultant Surgeon, St. Paul’s Hospital, Hong Kong
• Honorary Consultant, Heung Hoi Ching Kok Lin Association
• Honorary Consultant, Hospital Centre S. Januario, Health Bureau, the Macao Special Administrative Region Government
• Honorary Professor in Surgery, Philippine General Hospital, University of Philippines
• Visiting Associate Professor of Laparoscopic Surgery,
  Sun Yat Sen University of Medical Sciences, Guangzhou
• International Advisory Committee, the American Society of Colon & Rectal Surgeons
• Examiner in General Surgery, Royal College of Surgeons of Edinburgh
• Examiner in General Surgery, College of Surgeons of Hong Kong
• Examiner in Surgery, MBBS Clinical Competency Tests

Member of Societies

• Honorary Fellow of The American Society of Colon and Rectal Surgeons (ASCRS)
• Honorary Fellow of the Philippine Society of Colon and Rectal Surgeons
• Honorary Fellow of the American Society of Colon and Rectal Surgeons
• Fellow of Hong Kong Academy of Medicine
• Fellow of the College of Surgeons of Hong Kong
• Fellow of Royal Society of Medicine
• Member of the Alice Ho Miu Ling Nethersole Charity Foundation
• Member of Asian Surgical Association
• Member of Association of Coloproctology of Great Britain & Ireland
• Member of British Medical Association
• Member of Diploma in Gastroenterology Nursing Academic Advisory Committee,
  the University of Hong Kong School of Professional & Continuing Education
• Member of European Society for Surgical Research
• Member of Endoscopy Services Medical Advisory Committee, HKSH
• Member of General Medical Association
• Member of Hong Kong Association of Day Surgery
• Member of Hong Kong Cancer Society
• Member of Hong Kong Medical Association
• Member of International HepatoPancreatobilary Association
• Member of Medical Protection Society
• Member of the Society of American Gastrointestinal Endoscopic Surgery