Dr. Liew San Foi commenced his practice in KPJ Ipoh Specialist Hospital in December 2004 as a Resident Consultant Paediatrician/Paediatric Cardiologist. He was a Medical Officer in Paediatric at few north bound hospitals namely Hospital Besar Pulau Pinang, Hospital Besar Kangar and Hospital Besar Alor Setar from 1994 to 1997. In November 1997 to 2001, he was the Consultant Paediatrician at Hospital Besar Alor Setar. He was attached to Institut Jantung Negara, Kuala Lumpur as a Senior Registrar in Diagnostic & Interventional Paediatric Cardiology. He has served as Consultant Paediatrician and Paediatrician Cardiologist at Penang Hospital. In 2002 to 2003, he was a Senior Fellow in Cardiology Department of Royal Children’s Hospital, Melbourne. He was also attached to Hospital Besar Pulau Pinang as Consultant Paediatrician & Paediatric Cardiologist.