Dr O’Connor graduated in Medicine from University College Cork in 1988. He completed general medical training in Cork University Hospital and Beaumont Hospital, Dublin and became a member of the Royal College of Physicians of Ireland in 1991. He spent two years at the Dermatology Department at St James’ Hospital and Our Lady’s Hospital for Sick Children, Crumlin, Dublin and then completed a Dermatology residency training program at the Mayo Clinic in Minnesota, U.S.A, 1994-1998 and subsequently completed a fellowship in Dermatologic Surgery and Mohs Micrographic Surgery at Mayo Clinic. He was on staff as Consultant Dermatologist and Mohs Micrographic surgeon at Mayo Clinic Arizona until 2002 when he returned to his current position in Ireland.
Dr O’Connor set up the first Mohs micrographic surgical department in Ireland and this is currently the only private hospital Mohs surgical department in the country. He is board-certified by the American Board of Dermatology (ABD) and a fellow of the American College of Mohs Surgery (ACMS). Dr O’Connor treats all skin diseases and has a particular interest and expertise in skin cancer, both non-melanoma skin cancer and melanoma and its treatment. He sees patients for Dermatology consultation at the Lee Clinic and performs surgical procedures at the Bon Secours Hospital.