John is the Group Chief Executive and cardiothoracic surgeon of the Mater Private Healthcare Group. He is responsible for all group operations at the Mater Private’s hospitals in Dublin and Cork and at its cancer centres in Limerick and Liverpool. A graduate of University College Cork, he undertook his surgical training in Ireland and completed his training as a heart transplant surgeon at the Cleveland Clinic. He was appointed consultant cardiac and transplant surgeon at the Mater Misericordiae University Hospital in 1995 and since then has also been a surgeon in the Mater Private. In 2009 John was appointed chairman of the Mater Private Heart and Vascular Centre before being appointed Chief Executive of the Mater Private Hospital in Dublin.