Because Girardelli retained Austrian citizenship while skiing for Luxembourg, he was ineligible to compete in the 1980 or 1984 Winter Olympics - but also to compete in the 1982 World Championships. (In contrast, regulations did allow to start for Luxembourg in the World Cup). For a while, his appearance at the 1985 World Championships was in doubt, but he was able to show evidence that he was in the process of claiming Luxembourg citizenship. The FIS gave special permission, and he won a silver medal in the slalom and bronze in the giant slalom. Girardelli received Luxembourg citizenship in time to compete in the 1987 World Championships. His first Olympics were in 1988 at Calgary, but he did not medal. In 1992 at Albertville, he won silver medals in Super G and giant slalom – the first medals for the Grand Duchy at the Winter Olympics, and Luxembourg's first Olympic medal since Josy Barthel's gold in the 1500 metres in 1952.