[1] Fischhuber discovered indoor sport climbing in 1995.

From 1997 to 1999 he participated in Lead climbing international youth competitions.

In 1999, when he was 16 years old, he entered the Austrian bouldering team and started competing in the Bouldering World Cup, winning his first bronze medal in 2003 and his first gold in 2004.

[2] Fischhuber has redpointed outdoor sport climbing routes up to grade 9a (5.14d), including making the ninth redpoint of Action Directe.

Fischhuber climbed boulder problems graded up to 8C (V15).