Mark completed a Bachelor of Dental Surgery at the University of Adelaide. He completed a Master of Science in Dentistry at the University of London and subsequently became a Fellow, by examination, of the Royal Australian College of Dental Surgeons.

He also has a Graduate Diploma in Dental Sleep Medicine and has a special interest in assisting those suffering from sleep apnoea and other sleep-breathing disturbances.

Mark has been a member of Sports Medicine Australia for more than 25 years and is the consultant dental surgeon for the Adelaide Football Club, a position he has enjoyed for more than 20 years. Dr Mark Earl practices every Thursday and Friday.