Dr David Teenan graduated from the University of Dundee in 1992 before returning to Glasgow to start his medical career. His first ophthalmology post was at the Glasgow Royal Infirmary and from there he moved to Ayrshire to complete his basic surgical training. He then completed his higher surgical training in Wales before returning to Glasgow for a Corneal and External Diseases Fellowship at Gartnavel General Hospital. Following completion of his training Dr David Teenan worked as a consultant Ophthalmologist in Glasgow, Cardiff and Ayrshire and is also an examiner for the Royal College of Surgeons.
His dedication to his profession and patients is evident from his clinical experience and continued attendance at seminars and conferences as both speaker and delegate.