Dr Mackenzie studied medicine at the University of Dundee, graduating in 2003 with and MB ChB and BMedSci. She was a junior doctor in Edinburgh, Fife and Dundee before starting specialty training in Clinical Oncology in Edinburgh in 2008. During her training she developed a special interest in head and neck cancers and after completing specialty training undertook a fellowship in Calgary, Canada. During her fellowship she focused on head and neck and skin cancers and developed a special interest in peer review of radiotherapy planning. She returned from Canada to start her consultant post in 2015. Her consultant role involves treatment of head and neck and skin cancers with both radiotherapy and drug therapies. She is involved in clinical trials for both patient groups. Dr Mackenzie is lead oncologist for SCAN for head and neck cancer and was part of the RCR working group publishing guidelines on peer review in radiotherapy planning.