 Koudelka's best finish at the FIS Nordic World Ski Championships was fifth in the team large hill event at Liberec in 2009.At the 2010 Winter Olympics, he finished seventh in the team large hill, 12th in the individual normal hill, and 23rd in the individual large hill events.He has finished fourth in the World Cup on five occasions since 2007, most recently in Lillehammer on the smaller hill.