Henryk Mückenbrunn came from a Jewish family and attended the School of Timber Industry in Zakopane. There he started practicing a number of winter sports in 1918 and competed in junior championships, mainly in ski jumping. Between 1923-26 he won Polish Championships in 18 km cross-country (1923), Nordic combined (1924, 1925), jumping (1924, 1925), in cross-country relay (1924) and in steeplechase skiing (1924). In ski jumping, he set two new Polish records (27 m in 1922 and 38 m in 1923). Despite being selected as a member of the Polish team for the 1924 Winter Olympics he did not start, probably due to a broken leg. At the 1925 World Championships, he finished 44th in both the 18 km cross-country and jumping. His last major success was the Czechoslovakian ski jumping title in 1926. That same year, he emigrated to France, where he became known as skier and mountaineer. He worked as a tennis coach in the summer and ran a ski school in the winter. Later he taught physical education at the Lyon University. In Chamonix, he owned a sporting goods store and was co-owner of a hotel. During the war he helped to guide Jews to the neutral Switzerland, although he himself had to live in hiding. In 1956, three corpses were found in the Vallée Blanche near Chamonix after a snowstorm; one of them was Mückenbrunn.