Career
He did not contest the 1957 general election. He was re-elected at the 1973 general election, but lost his seat at the 1977 general election.
politician Deputy to the Dáil senator of Ireland
He did not contest the 1957 general election. He was re-elected at the 1973 general election, but lost his seat at the 1977 general election.
O'Sullivan was an unsuccessful Fine Gael candidate for Dáil Éireann at the 1937 general election in the Cork West constituency, was defeated again at four further general elections before finally being elected to the 19th Dáil nearly thirty years later. He was first returned to the Dáil at the age of 68 at the 1969 general election, as the only Fine Gael TD in the 19th Dáil for the 3-seat Cork South–West constituency.