Dr Mackay trained as a consultant medical oncologist with a special interest in cancer genetics at Trinity College Cambridge and the University of Edinburgh Medical School.
He established the NHS Cancer Genetics Services in East Anglia at Addenbrooke’s Hospital and North East Thames at Great Ormond Street Hospital. He left the NHS to establish a private practice in 2006.
Dr Mackay is an Honorary Senior Lecturer in the Research Department of Oncology, the Cancer Institute, University College London and has been involved in clinical academic projects throughout his career.
He is involved with several national cancer charities. Having worked with several commercial genetic testing companies over the last few years, he now acts as Everything Genetic’s UK and International Medical Director.