 He was head coach of Alemannia Aachen from 13 September 2006 until the end of the season 2006–07 when he resigned due to the club's relegation.In January 2008, he was named head coach of Arminia Bielefeld and took over for interim head coach Detlev Dammeier after the winter break.Eventually, it was announced that his contract was extended until 2010 but on 17 May 2009, Frontzeck was fired.