Bennett attends Hamblin and Porter’s School in Cork, and the Academic Institute in Hardcourt Street. He enrolls in medical school at Trinity College, Dublin in 1854 at the age of 17. At college he studies under professor Robert Smith, under whom he develops an interest in bone fractures. He gains the degrees of BA and MB before graduating with a M.Ch. in 1859 and MD in 1864. He is conferred with a fellowship of the Royal College of Surgeons in Ireland (RCSI) in 1863.
Following a period as an anatomy demonstrator Bennett is appointed as Surgeon to Sir Patrick Dun’s Hospital in 1864. He succeeds Robert Smith as Professor of Surgery in 1873 following his death. He studies fractures, joint dislocations and bone diseases, recording them at the Pathology Museum at Trinity College. He describes his eponymous fracture at the British Medical Association meeting in Cork in 1880 and today he is best remembered for the fracture he describes which still bears his name. Perhaps more importantly, however, he is accredited with having introduced antiseptic techniques to Dublin hospitals. Bennett also serves as President of the RCSI.
Edward Hallaran Bennett dies in Dublin on June 21, 1907.