During his active career, he most notably played for 2. Bundesliga for SV Waldhof Mannheim in the mid-1990s before ending his playing career in the Regionalliga for SC Idar-Oberstein in 2000. He then embarked on a coaching career, managing the youth teams of several clubs between 2000 and 2006 and again 2009, as well as amateur clubs while at the same time working for the United States Soccer Federation. From 2011 to 2014, Titz coached FC 08 Homburg in the Regionalliga Südwest before joining Hamburger SV in 2015, initially taking over the U17-team and later the reserve team. From 13 March 2018, he was head coach of the Hamburger SV first team before being dismissed on 23 September 2018. Prior to the 2019–20 season he joined Regionalliga club Rot-Weiss Essen but was dismissed after one season after failing to reach play-off promotions.
