He won the gold medal in the individual large hill at the 1928 Winter Olympics in St. Moritz.

He won the bronze medal in the Individual large hill at the 1972 Winter Olympics in Sapporo.

At the Olympic Winter Games in Salt Lake City, he won gold in the team large hill and silver in the individual normal hill.

On Sunday, February 14, Lamy-Chappuis won the Olympic gold medal in the 10km individual normal hill.

He won the championships in the normal hill in 1976, and both normal and large hill in 1977.

Olli has a total of four Continental Cup wins in the individual normal hill during 2005-06.

He won a gold medal in the individual large hill at the 1930 FIS Nordic World Ski Championships in Oslo.

In 1998, he won gold in the large hill and silver in the normal hill, and he helped the Japanese to the team gold.

He won a silver medal in the individual normal hill at the 1991 World Championships.

He won a silver medal in the individual large hill at the 1974 FIS Nordic World Ski Championships in Falun.