 He participated at the World Championships in Vail 1999, St. Moritz 2003 and Bormio 2005 and competed at the 2002, 2006 and 2010 Winter Olympics.He earned his maiden World Cup victory during a Super-G event in Lake Louise, during the 2011, edging the reigning World Cup champion and teammate Carlo Janka.His brother Jürg Grünenfelder is an alpine skier as well.