Career
Aigner made his Bundesliga debut with in the 2002/2003 season and moved to after 4 seasons in Innsbruck. In summer 2008, he left FK for newly formed Austrian second-division side – who were acquiring the playing licence of South Carolina Schwanenstadt for the 2008/09 campaign – where he was joined by team-mates Sanel Kuljic, Yüksel Sariyar and Saso Fornezzi. Aigner moved onto LASK Linz in the First League for the 2011-2012 season before transferring to South Carolina Rheindorf Altach for the start of the 2012-2013 season.