Since the 1999 Contest, Knoll following Ernst Grissemann has been the Austrian commentator for the Eurovision Song Contest and since 2002 Knoll has hosted the Austrian Heat for the Eurovision. Knoll has also commentated for Austria at the Eurovision Dance Contest since the 2007 Contest.
Knoll graduated from the Academy of Commerce in 1992 and has been a radio presenter for Hitradio Ö3 since 1994.
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