Dr Ooi Wei Seong is a medical oncologist and medical director at the International Cancer Specialists, Paragon Medical. He graduated from Trinity College Dublin with honours distinction in 1999. After getting oncology training at St Vincent’s University Hospital in Dublin, he became a clinical fellow in oncology at Sunnybrook Odette Cancer Centre in Toronto, Canada. Upon returning to Singapore, he obtained his specialist accreditation in medical oncology.

His main interest lies in lung, breast, and colon cancers. He frequents conferences around the world to continuously update his knowledge in the latest cancer treatments. In addition to management of all solid tumours, Dr Ooi has a special interest in bone health and mechanisms of bone metastases in cancer patients.

Outside of his clinical practice, Dr Ooi is an active speaker, tutor, and researcher. He has given talks about cancer management to overseas oncologists and general practitioners around the region. In Singapore, he has spoken at GP symposiums, public forums and also conducted Cancerwise workshops. He also provided training and teachings to medical students, nurses, Duke-NUS students, and elective fellows.