He won his first international championship medal at the 1982 FIS Nordic World Ski Championships in Oslo with a silver medal in the team large hill competition. In December that year he won the World cup competition in Thunder Bay, Ontario, Canada. He won six competitions in that season, but ended in 2nd place overall behind Matti Nykänen.
At the 1985 FIS Nordic World Ski Championships in Seefeld, he won silver medals both in the individual normal hill and the team large hill.
He won the FIS Ski-Flying World Championships 1986 in Bad Mitterndorf, the 1987 FIS Nordic World Ski Championships in Oberstdorf with gold in the individual large hill and bronze in the team large hill events. Felder also won the ski jumping competition at the 1987 Holmenkollen ski festival.
In the 1990/91 season, Felder won his only Overall title and also won the team large hill gold medal at the 1991 FIS Nordic World Ski Championships in Val di Fiemme. He also won a silver medal in the team large hill at the 1992 Winter Olympics in Albertville.
Felder finished his career with victory on 29 March 1992 when he won the ski jumping competition in Planica, Slovenia.