Clemens Selzer has been one of the best track cyclists in Austria since the mid-2000s. As a junior in 2003, he won three Austrian championship titles, in the 1000-meter time trial , in the sprint and in the points race . In 2006 he was two-time champion of the elite, in the sprint and time trial. Since then he has achieved a total of 19 national elite titles on the track (as of 2014).
In 2010 Selzer belonged to the Styrian Sprint Cycling Union , which was founded to promote Austrian track cyclists in the short-term disciplines; The goal was the 2012 Olympic Games in London . Selzer's teammate Daniel Baldauf was banned for doping for two years in autumn 2010 ; then the association had to cease operations. Selzer failed to qualify for London.