Hauser's greatest success at national level was winning the Swiss national championships in 2007 and 2009. Internationally, he was most successful at the 2007 World Cup in Edmonton with his fourth place so far. His team, for whom he started third , was able to achieve this fourth place again in Moncton at the 2009 World Cup . In the junior sector, he has already achieved successes such as the national junior title, but also a junior bronze medal at world championships.