Dr Susan Cleator is a Consultant Clinical Oncologist based at Charing Cross Hospital, part of Imperial College Healthcare NHS Foundation Trust.

Dr Cleator trained at Oxford University and Hospitals, and undertook her oncology training at the Charing Cross, Hammersmith, Mount Vernon and The Royal Marsden Hospitals. During this period she also spent three years working full-time on her PhD project at the Institute of Cancer Research and Royal Marsden Hospital. This focused on identifying a molecular assay for predicting the response of breast cancers to chemotherapy. She has published on this and a number of other aspects of oncology.

She works closely with her surgical colleagues at St Mary's hospital where she is responsible for the chemotherapy and radiotherapy aspects of their treatment, specializing in breast, colorectal and lymphomatous cancers. 

Dr Cleator was previously a member of Breast Cancer Studies Group (overseeing Breast Cancer National Research portfolio) and is a member of the American Association Cancer Physicians and the British Medical Association.