Career
He plays as a winger for Arminia Bielefeld. He made his Bundesliga debut for VfB Stuttgart on 22 October 2011 against 1. Football Club Nuremberg. Four days later Hemlein scored in the second round of the 2011-2012 DFB-Pokal against FSV Frankfurt his first goal for the first team of VfB Stuttgart.
On 1 July 2013, Hemlein moved to Nippon Electric Corporation Nijmegen.
On 15 May 2013, Hemlein signed a contract until June 2016 with Nippon Electric Corporation Nijmegen. After the relegation of Nippon Electric Corporation, Hemlein left the Eredivisie side.
He signed with Arminia Bielefeld which plays in the German 3.