As is usual with ski crossers, Zangerl was an alpine ski racer at the beginning of his sports career . From November 1998 he took part in FIS races . The best result was a 17th place, which is why he contested his last alpine race in April 2000.
After an almost three-year break, during which he discovered his tendency to ski cross, Zangerl made his debut in Les Contamines in the Freestyle World Cup on March 12, 2003 , but was unable to qualify for the finals. The following 2003/04 season he began with a 13th place in Saas-Fee , which meant winning World Cup points for the first time. On February 21, 2004, he was eighth for the first time in the top ten in Naeba . Due to injury, Zangerl was only able to contest a few races in the two following winters. He only succeeded in reconnecting to the top in the 2008/09 season . On February 19, 2009 he finished second in Voss and thus achieved his best result in a World Cup race to date. Two weeks later he won the silver medal at the 2009 World Championships in Inawashiro , behind his compatriot Andreas Matt .
In the 2015/16 season , Zangerl achieved second place and four other top 10 results in Idre , while he did not get past eighth place in the 2016/17 season .