Having qualified as a dentist in 1987 from Bristol University, Siamack entered general practice for two years prior to embarking onto a hospital career. Following two years of resident oral surgery posts, Siamack attained the FDS from the Royal College of Surgeons of England, he then entered a three year Registrar post in Orthodontics at King's College of London and Queen Mary's, Sidcup. During this period Siamack attained his orthodontic qualifications from the Royal Colleges of England and Edinburgh as well as an MSc from the University of London. He is now the principal of five clinics. Siamack is heavily involved with various dental and orthodontic committees as well as being the founding member of the Kensington, Chelsea and Westminster Study Club.