• Colorectal Surgery.
• Colonoscopy and Gastroscopy.
• Screening for cancer.
• Surgery for colorectal cancer esp. Key-hole and Stoma avoidance colorectal surgery.
• Surgery for complications of Inflammatory Bowel and Diverticular Disease.
• Comprehensive treatment of Piles or haemorrhoids including Longo stapled haemorrhoidopexy and THD procedure.
• Treatment of anal fistulae and fissures.
• Treatment of constipation and faecal incontinence.
• Visiting consultant Dept of Colorectal Surgery, Singapore General Hospital.
• Visiting consultant Division of Colorectal Surgery, National University Hospital.
• Adjunct associate professor of Surgery, National University of Singapore.
• Founding chairman of the Society of Colorectal Surgeons, Singapore.
• Inaugural chairman of the Asean Society Colorectal Surgeons.
• Past vice president of International Society of University Colorectal Surgeons.
• Member of the American Society of Colon & Rectal Surgeons.
• Member of the Association of Coloproctology of Great Britain and Ireland.
• Arthur Pyke Charity Scholarship to study medicine at King's College London University.
• Clinical Assistant in Surgery St Mark's Hospital for Diseases of the Rectal and the Colon.
• Research fellow, Imperial Cancer Research Fund, London.
• Founding head, Dept of Colorectal Surgery, SGH.
• Galloway Gold Medal and Memorial Lecture, Singapore.
• Singapore National Science and Technology Medal 1995.
