Education
A tall central defender, Aigner made his debut in the Austrian Bundesliga for Admira/Wacker in 1986 and finished runner-up to Swarovski Tirol with Admira in the 1988-1989 season.
A tall central defender, Aigner made his debut in the Austrian Bundesliga for Admira/Wacker in 1986 and finished runner-up to Swarovski Tirol with Admira in the 1988-1989 season.
Admira would also reach the Final that season. In 1994 he signed for second division side VSE Saint Pölten before returning to Admira in 1996. In 2001 he moved to ASK Group (a software company) Kottingbrunn before retiring with amateur side 1.
South Carolina Sollenau.
He played for the Austrian national team, making his debut in an international friendly against Norway on 31 May 1989, in a 4-1 victory. He was a participant at the 1990 World Cup. After the 1990 World Cup, Aigner played only one more international, which was against Yugoslavia on 31 October 1990.