Dr Tay is currently the Head of the Vascular and Interventional Radiology Department and Assistant Chairman of the Division of Radiological Sciences at Singapore General Hospital. He is Associate Professor at the Duke NUS Graduate Medical School Singapore as well as at the Yong Loo Lin School of Medicine in National University of Singapore. Dr Tay is also the Academic Vice Chair for Clinical Service Transformation of the Singhealth Duke NUS Radiological Sciences Academic Clinical Programme.

Dr Tay did his medical and radiology training in Singapore. He was inducted as Fellow of the Royal College of Radiologists (FRCR) in 1997, Fellow of the Academy of Medicine Singapore (FAMS) in 2003 and Fellow of the Society of Interventional Radiology (FSIR) in 2010. Dr Tay has authored or co authored more than 80 peer reviewed publications and 350 oral/poster presentations. He has delivered more than 250 invited lectures at local and international conferences, held 15 research grants and 2 patents.

Dr Tay is Visiting Consultant to the KK Women and Children Hospital and National Heart Centre Singapore. He is also the Vice President of the College of Radiologists Singapore.