Dr. Wong Poo Sing is a Consultant Cardiothoracic Surgeon at the Mount Elizabeth Medical Centre.

He received his MBBS from the University of London (1986) and is a Fellow of the Royal College of Surgeons (Edinburgh)(1990), a Fellow of the United Kingdom Intercollegiate Specialty in Cardiothoracic Surgery(1995), a Fellow of the American College of Chest Physicians (2000), a Fellow of the European Board of Thoracic and Cardiovascular Surgery (2000), a Fellow of the Academy of Medicine, Singapore (2002) and a Fellow of the Academy of Medicine, Malaysia (2006). 

Dr. Wong was previously an Associate Professor in Surgery at the National University of Singapore, a Senior Consultant and Clinical Director (Department of Cardiac, Thoracic and Vascular Surgery) at the National University Hospital, the Director of Thoracic Surgery, The Heart Institute, a Visiting Consultant (Department of Surgery) at Tan Tock Seng Hospital in Singapore and the Head and Consultant Cardiothoracic Surgeon at the Sultanah Aminah Hospital in Johor Bahru, Malaysia.

He has published extensively in both local and international peer-reviewed journals and has been speaker at conferences in Malaysia, Philippines, Thailand, Vietnam, Indonesia, Australia, Bangladesh and the USA. Dr. Wong has also been a reviewer for several journals including Asian Thoracic and Cardiovascular Surgery Annals, European Journal of Cardiothoracic Surgery and the Annals of the Academy of Medicine, Singapore.

Dr. Wong has performed more than 3,500 cardiac surgeries including coronary artery bypass grafts (CABG), aortic and mitral valve procedures, and more than 500 thoracic surgeries including lung resection for malignancies and video-assisted thorascopic surgery. 

His research interests include the assessment of myocardial injury and C-reactive protein after CABG surgery, the roles of nitric oxide and hydrogen sulphide in human arteries with diabetes and hypertension, foetal lung tissue in the co-culture of human embryonic stem cells with foetal lung tissue, and other projects related to cell lung cancers and tumour cells.