Dr Leow graduated with a degree in medicine from the University of Calgary in Canada before completing postgraduate specialist training in Sleep and Respiratory Medicine in New Zealand. He moved to Singapore in September 2013 and started work as a Senior Consultant at the Department of Respiratory and Critical Care Medicine as well as the Sleep Disorders Unit at SGH. Apart from his work in Respiratory Medicine, he has a special interest in Sleep medicine and Chronic Non-Invasive Ventilation(NIV). He is the current Director of the SGH Sleep Center Adjunct Assistant Professor at Duke-NUS Medical School and Clinical Senior Lecturer, NUS YLL School of Medicine. He is the founding Chairman of the Chapter of Sleep Medicine Physicians ,Academy of Medicine, Singapore.  He was the past president of the Singapore Sleep Society and current exco member, and remains passionate about the development of sleep medicine in Singapore.

He manages patients with a wide range of Respiratory conditions such as chronic cough, asthma, COPD and bronchiectasis, and Sleep Disorders ranging from obstructive sleep apnoea, circadian rhythm disorders to narcolepsy and chronic respiratory failure.