In August 1994, Brunmayr started his professional career with FC Linz, making his Bundesliga debut, and was signed by Vienna club Austria Wien in 1996.

In August 2000, Brunmayr made his debut for the Austria national team against Hungary, and earned eight caps, scoring one goal.

Brunmayr left Blau-Weiß for the 2021–22 season and became Oliver Glasner's assistant coach in Germany at Bundesliga club Eintracht Frankfurt.

On 19 February 2024, Brunmayr linked up with Glasner again, becoming assistant manager at Premier League club Crystal Palace.

This biographical article related to association football in Austria, about a forward, is a stub.