Dr Zhang Zewen completed senior residency training in medical oncology at SGH NCC and is currently a Medical Oncologist in NCCS sub-specializing in Breast cancer and Gynecological cancer. He has a special interest in Cancer Genetics, and is part of the Cancer Genetics Service team involved in research related to hereditary cancer predisposition syndromes, including Hereditary Breast and Ovarian Cancer and Lynch syndrome. He is also passionate towards medical education and serves as Clinical Instructor in both Duke-NUS Graduate Medical School and Yong Loo Lin School of Medicine.