In his career, Hollenstein played 650 matches in the NLA and 131 for Switzerland men's national ice hockey team, where he scored 47 goals.

Felix Hollenstein began his career in the EHC Bülach, for which he played until 1985.

As the score was 0:6, in the sixth semi final match in the series between Kloten and the HC Davos it was decided that he should play the last part of the game.

In February 2013, he came back to Kloten and was hired as head coach after the sacking of Tomas Tamfal.

Felix Hollenstein was part of the core of the national team of Switzerland between 1988 and 1997.