The most significant success of his career was winning the giant slalom at the 1984 Winter Olympics in Sarajevo on February 14th . In 1985 he was tenth in the same discipline at the World Championships in Bormio . In addition to his Olympic victory, he only won one other World Cup race, namely on December 12, 1983 a giant slalom in Les Diablerets . He also won a parallel slalom on November 29, 1982 in Bormio and a giant slalom on November 24, 1983; both races only counted for the nations ranking. He achieved his best slalom result in January 1984 with fifth place in Parpan .
Julen ended his career in 1987 at the age of 26 and has been running a hotel in his home town of Zermatt ever since. He is married and has three children, and has been a trained sporting goods seller since 1979. His father Martin Julen sen. was also a ski racer and won the Lauberhorn Slalom in Wengen in 1955 .