Sue trained in medicine at Cambridge University and then St Thomas' Medical School in London. She completed her surgical training in the South West Thames Region, at St Mark's Hospital and at Mount Sinai Hospital in Toronto.

She then spent three years as a consultant at the Royal London Hospital before returning to St Mark's. During this time Sue set up a family cancer clinic to provide services for inherited or potentially inherited colorectal cancer in the North East London Cancer Network. Sue's practice covers most aspects of colorectal and anal surgery. Her main subspecialist area of expertise is in inherited colorectal cancer syndromes and she is the Director of the St Mark's Hospital Polyposis Registry.