Sim is a member in the Expert Writing Panel for Clinical Practise Guidelines on management in cardiovascular disease in Malaysia; a task force member of the International Commission on Radiological Protection (ICRP) on radiation protection in cardiology; and a member of
International Atomic Energy Agency (IAEA)’s Expert Panel on Radiological Protection of Patients. Between 1996 and 2015, he participated as either a faculty member or speaker for more than 200 professional meetings in the US, Europe and Asian-Pacific; made over 200 scientific abstract presentations; over 50 scientific publications (including
NEJM); and over 125 clinical trials as a
principal investigator. He received Clinical Research Malaysia (CRM) Leadership Award in 2024. His research interests include cardiac CT, cardiac MRI, metabolic syndrome and ACS biomarkers in the multi-ethnic Asian community. He is a principal investigator/steering committee member in more than 100 multicentre clinical studies in Malaysia. == Professional credentials ==