A/Prof Marcus Ong is a Senior Consultant, Director of Research, and Clinician Scientist at the Department of Emergency Medicine in Singapore General Hospital (SGH). He is also the Director for the Health Services Research and Biostatistics Unit, Division of Research, in SGH. He serves as a Senior Consultant at the Hospital Service Division and Director for the Unit for Pre-hospital Emergency Care in Ministry of Health, Singapore. He is also Associate Professor at Duke-National University of Singapore Medical School.

His academic credentials include a medical degree from the National University of Singapore in 1993. A/Prof Ong obtained his Fellowship in emergency medicine with the Royal College of Surgeons, Edinburgh, Scotland, and the Academy of Medicine, Singapore. He completed his fellowships in emergency medical services and pre-hospital care in Canada and USA. A/Prof Ong obtained his Master of Public Health at Virginia Commonwealth University in 2005.

A/Prof Ong has been actively involved in research, education and clinical services for more than 10 years. His research studies focus predominantly on pre-hospital emergency care, medical devices, and health services research. He has published 100 papers in international and local peer-reviewed journals.