Career
Schmitz began his career with TSG Sprockhövel. Here he scored 11 goals in 23 games during the 2006-2007 season of the Verbandsliga Westfalen 2. In July 2007, he signed for VfL Bochum World War II He played 36 games with the VfL Bochum reserve squad.
Schmitz transferred to nearby rivals on 8 May 2009.
He made his professional debut on 18 September 2009 in a match against VfL Wolfsburg. Schmitz signed a four-year contract with Werder Bremen on 17 June 2011.
Position Schmitz plays as a left midfielder or a defensive midfielder. In the 2010-2011 season, he became the Schalke"s main left fullback.
Schmitz studies Political sciences and Science of Public Administration over distance learning.