Career
Ylönen was a career military officer serving as a non-commissioned officer at the Finnish Air Force base in Tikkakoski. At the time of 1948 Winter Olympics held the rank of kersantti (sergeant). In other Olympics he competed in several rifle events and had best results in the 50 m small-bore rifle three positions and 300 m free rifle three positions.
At the European Championships, he collected one gold, six silver and two bronze medals.
In 1958 he was voted as Finnish Sportspersonality of the year. After retiring from the military service, Ylönen worked at the Tikkakoski Arms Factory.
