Career
Bundesliga. Trimmel started his career at local club University of Southern California Mannersdorf. He switched to ASK Group (a software company) Horitschon, where he played for two seasons until he was discovered by Rapid Wien. He signed with Rapid in 2008, and initially played for the amateurs, but quickly managed to receive a place in the first team squad.
On 2 August 2009, in only his sixth league game, Trimmel scored a hat-trick in the 5–1 victory over Austria Kärnten, in only six minutes (84, 87, 90).
International
On 5 August 2009, it was announced that Trimmel was a part of the national team squad for the upcoming friendly match against Cameroon.