[2] Redmond attended primary and secondary school at St Mary's College, Dublin.
[3] He then studied medicine at the Royal College of Surgeons in Ireland,[1] graduating in 1987 with the qualifications LRCP & SI MB BCh NUI.
[3] Redmond served as a member of the Johns Hopkins faculty for three years as Director of Paediatric Heart and Lung Transplant, Co-Director of the Dana and Albert "Cubby" Broccoli Centre for Aortic Diseases, and Director of the Cardiac Research Laboratories.
He also performs surgery for the Belfast Health and Social Care Trust in Northern Ireland.
[10][11] In 2008, Redmond collaborated with Professor Martin Corbally and the cardiac team at Our Lady's Children Hospital, Crumlin to develop a cardiothoracic surgery training programme at Paediatric Hospital Number 2 in Ho Chi Minh City, Vietnam.