Corrigan was educated at the Royal School, Armagh, and the Royal Military Academy Sandhurst. He served in the British Army's Royal Gurkha Rifles, mainly in the far east, and reached the rank of major.
Corrigan received his education from the Royal School in Armagh and the Royal Military Academy Sandhurst. He was stationed with the British Army's Royal Gurkha Rifles, predominantly in the eastern regions, and rose to the position of major.