Dr Peter Ang is an oncologist at Gleneagles Hospital and Mount Elizabeth Hospitals, Singapore.

Prior to entering private practice, he was a senior consultant medical oncologist and director of the Cancer Education Service in 2004 at National Cancer Centre, Singapore. Dr Ang was also a visiting consultant to KK Women's and Children's Hospital to support the setup of the cancer genetics service which sees breast, ovarian and other gynaecological cancer patients.

He was the leading cancer specialist of the breast cancer workgroup in 2002 for the National Cancer Centre and SingHealth cluster. In 2013, he was involved in implementing the cluster breast cancer health management plan, incorporating the best breast cancer information with his team of doctors.

He was the programme leader for Public Cancer Education with SingHealth Cancer Service Development Line in 2004. In clinical work, he was awarded the National Excellent Service Award (EXSA) in 2005. He is involved in providing comprehensive oncology information and excellent care for patients with a wide range of cancers including lung cancer, stomach cancer, colorectal cancer, lymphoma, kidney cancer, breast cancer, ovary cancer, uterus cancer, and cervix cancer.

He has been actively involved in clinical and translational research in breast, lung and colorectal cancers as well as cancer genetics. His research work has been published in both local and international journals including Journal of Clinical Oncology, Chest, Lancet Oncology, Seminars in Oncology and Respiratory Medicine. He was also the editor and main author of a book on breast cancer, titled "Illustrative Cases in Breast Cancer". He lectures frequently in Singapore and abroad.

Dr Ang is currently a visiting consultant to National Cancer Centre and is actively involved in research and teaching. He had been an active clinical teacher with the National University of Singapore, and was a speaker for the Breast Cancer Foundation, Association of Women Doctors of Singapore, and Singapore Cancer Society.

Regarded as an authority in breast cancer, Dr Ang was invited as one of the speakers for the first Singapore Medical Oncology Review Course in 2007 and the first regional Asian Oncology Summit in 2009. He was also one of the regional keynote speakers for the Asia Breast Cancer Collaborative Group Meeting in 2010 and the Guangzhou International Breast Cancer Symposium.