Education
Born in Ballymena, O'Hagan studied at Ballymena Technical College before becoming an accountant, soon founding J. J. O'Hagan and Company.
politician Member of the Legislative Assembly of Northern Ireland
Born in Ballymena, O'Hagan studied at Ballymena Technical College before becoming an accountant, soon founding J. J. O'Hagan and Company.
He stood at the Northern Ireland local elections, 1973 for Ballymena Borough Council as an independent, but was not elected. After the election, he joined the Social Democratic and Labour Party (SDLP), and was immediately adopted as one of their candidates for North Antrim at the Northern Ireland Assembly election, 1973, even though the election was a mere six weeks later. He was successful, becoming the only nationalist representative for the seat.
However, he did not stand for the Northern Ireland Constitutional Convention in 1975, instead leaving politics.
1st Northern Ireland Assembly (1973–1974).