Career
Şişmanoğlu played his debut on 14 December 2007 against FSV Mainz 05 for Football Club Saint Pauli. On 23 June 2009 left Football Club Saint Pauli and signed for Kayserispor. He scored league goal at his debut game against Eskişehirspor, ended 0–1 for Beşiktaş, on 5 October 2013.
He holds German citizenship.