Education
O'Neill was educated at Dromore National School and Bellisle Academy.
politician Member of Parliament in the United Kingdom
O'Neill was educated at Dromore National School and Bellisle Academy.
He was a farmer and a chairman of the Gaelic Athletic Association. He was later associated with the Anti-Partition of Ireland League. At the Mid Ulster by-election, 1956, the League stood O'Neill in an attempt to unseat abstentionist MP Mitchell, but this split the nationalist vote and independent Unionist George Forrest was elected.
[40th United Kingdom Parliament]
He served as a councillor on Tyrone County Council and resigned as a member of Omagh rural council protesting about the allocation of housing. O'Neill was elected Member of Parliament for the Mid Ulster constituency in 1951 as Independent Nationalist, serving in the House of Commons.