Before retiring in 2010, Pederen-Bieri was one of the most successful skeleton athletes in the world. Pedersen-Bieri won the FIBT World Championships in the women's skeleton event in 2001 and 2005, and earned two medals at the 2007 FIBT World Championships in St. Moritz with a silver in the women's skeleton and a bronze in the mixed bobsleigh-skeleton team event. Pedersen-Bieri also won a silver in the mixed team event at the 2009 championships.