Mr Barry qualified from the University of Sydney, Australia, and obtained a Fellowship in Surgical Oncology in sarcoma, melanoma, and breast cancer at The Royal Marsden from 2000–02.

He now focuses on breast oncoplastic techniques and reconstructive options following cancer surgery as well as preventative surgery for high-risk women and has been a consultant surgeon at The Breast Unit, Royal Marsden since 2012.

He introduced the chest wall perforator flap service for breast conservation which has led to the development of targeted axillary dissection. He has an interest in translational medicine with publications on tumour evolution and heterogeneity in breast cancer and also leads the development and trialing of new devices in surgery.