He was also player-manager of Crusaders for one year and in 2000 the club qualified for Europe after he had made three European appearances as a player. Apart from a brief spell as Athlone Town manager in 2004, Aaron had been a coach at Longford Town from July 2002 until the end of the 2006 season. Following a year out from the game, Aaron was appointed Longford Town FC manager in December 2007. Due to financial constraints at the club Aaron resigned as manager on 30 August 2008. Aaron was one of the first coaches in Ireland to obtain the UEFA Pro Licence in 2007. He is currently a coach education tutor for the Football Association of Ireland and sports development officer for Dublin City Council. Aaron has played for the Republic of Ireland U21s and was appointed Rep of Ireland U.14 International Coach for 2 years in 1997.