Hamish qualified at Guy's Hospital in 1982 and worked in the hospital service as a junior oral and maxillofacial surgeon before being commissioned into the Royal Army Dental Corps in 1988. They obtained the Fellowship in Dental Surgery of the Royal College of Surgeons of England in 1991 and are on the General Dental Council's Specialist Register in Oral Surgery. In 2000, they completed the MSc programme at the Eastman Dental Hospital and was awarded the Master of Science in Conservative Dentistry from University College, London, with distinction.

Hamish served with the Army in the UK and Germany, in Iraq and Kosovo, and in the United States on loan to the US Army Dental Corps. They were joint winner of the 3M Dental Prize in the same year. They left the army in 2009 to join the practice as a general dentist. Hamish are also appointed as Clinical Teaching Fellow in the department of fixed and removable prosthodontics at Leeds Dental Institute, where they help teach a new generation of undergraduate dental students. They are a straight-talking dentist who believe that dental health are achievable and worthwhile for everyone: "What most of my patients really need are caring, preventative dentistry, done extraordinarily well. I want them to be well-informed about their diagnosis, and about the choices available to them, so that they can invest confidently in their dental health. My aim in treatment is to achieve a predictable result, with a responsible level of intervention, and with a reasonable expenditure of time, money and effort."