January 2009 after a successful trial signing a 2.5-year contract until 30 June 2011. He made his 2. Bundesliga début on 30 January 2009, as a 64th-minute substitute for Frank Wiblishauser in a 0–0 draw with Rot-Weiß Oberhausen. His first start came on 6 February 2009, against FSV Frankfurt. A week later, he scored his first 2. Bundesliga goal and recorded his first assist in a match against SV Wehen Wiesbaden. Stieber later scored four more goals in seventeen appearances against Greuther Fürth, Osnabrück, Duisburg and Freiburg. The 2009–10 season started well for Stieber when he provided two assists, in the first round of DFB–Pokal, in a 4–0 win over Concordia and then scored his first goal of the season in the second round of DFB–Pokal, in a 4–2 win over Energie Cottbus. However, Stieber's appearance in the 2009–10 season was restricted to 21 appearances, due to injuries. Alemannia Aachen With a one–year contract left remaining, it was announced on 26 May 2010, Stieber left TuS Koblenz and signed for Alemannia Aachen on two–year contract, keeping him until 2012. Stieber made his Alemannia Aachen debut, in the opening game of the season, where he set up one of the goals, in a 2–2 draw against Union Berlin on 20 August 2010. Stieber then scored his first Alemannia Aachen goal on 17 September 2010, in a 3–2 loss against Energie Cottbus. He went to score two more goals in three matches against FSV Frankfurt and Paderborn 07. By the end of 2010, Stieber scored one more goal, which came against Ingolstadt 04 on 17 October 2010. As the season progressed towards the end of the 2010–11 season, Stieber scored his first goal of 2011 and set up two of the four goals, in a 4–2 win over Karlsruher SC on 22 January 2011. In Stieber's first game following the announcement came on 3 April 2011, in a 2–1 win over 1860 Munich. Stieber later added five more goals, including a brace against Rot-Weiß Oberhausen and set up one of the goals, in a 4–0 win on 29 April 2011. Playing in a three-man attack under the management of Peter Hyballa, Stieber finished the 2010–11 season at Alemannia Aachen, where he played all 34 matches in the league and scoring ten times, making the club's top–scorer. Additionally, Stieber's average grade of 3.03 passes made him the best fielders in the league in