Committee appointments in SGH and Singapore：

1. Chairman of the Hospital Radiation Safety committee.

2. Chief of the Outram Campus Emergency Radiation Response Team.

3. Member of SGH Safety Network.

4. Member of SGH Emergency Crisis Management of Animal Facilities Committee (CECMAF) 5. Member of the SGH Institutional Animal Care and USE Committee (IACUC)

6. Visiting Specialist on radiology physics, radiation safety to the National Heart Centre, Singapore Experimental Medicine Centre, Tan Tock Seng Hospital and Khoo Teck Huat Hospital.

7. Member of MOH Nuclear Medicine Advisory Committee, 2016 8. Member of MOH Medical Devices Committee, 2016 9. Member of Central Proton Therapy Governance Committee, MOH, Singapore, 2016

Committee appointments in Singapore：

Member of Singapore Accreditation Council (SAC) technical committee for medical imaging.

Membership in professional organisations

1. Founding member & current President of the Society of Medical Physicist of Singapore.

2. Associate member of the International Organisation of Medical Physicist