 FSV Mainz 05 on a two-year-contract on 28 February 2011 and joined after the 2010–11 season when his contract with Copenhagen expired.In July 2014 he returned to SFC Opava which played in the Czech second division and where he started with professional football.On 17 August 2005, Pospech made his debut in the senior team of the Czech Republic, as he played one half of the match in a 1–2 defeat against Sweden.