[2] At school, Villemson focused on accounting and foreign languages.

He started as a speed skater in 1909 but later changed to running and won three consecutive Russian 1500 m titles in 1914–16, placing second-third over 400 m and 800 m and setting multiple Russian records in 800–1500 m events.

He was representative for the 1924, 1928 and 1936 Estonian Olympic teams and served as a wrestling judge at these games.

In 1944, following the Soviet occupation of Estonia, he fled to Germany and then to the United States, arriving there in 1949.

He worked in Chicago as a controller at an electrical appliances factory and for many years headed the Estonian Society.