After his career as a player Kocaman served as manager of Istanbulspor for four successive seasons. Uzan Family withdrew its support from Istanbulspor in 2001. Because of this, Istanbulspor fell into financial crisis, and became 9th in 2002–03 finally in 2003. In 2004, financial problems at Istanbulspor forced him to leave and he signed a two-year contract to coach Malatyaspor. He resigned in March 2005 from his duty at Malatyaspor. He coached Konyaspor in the 2005–06 season and Ankaraspor in the 2006–07 season. He returned to Ankaraspor in the 2008–09 season. He mentored the talented Turkish winger Özer Hurmacı and introduced him to professional football. He became Fenerbahçe's Director of Football in the 2009–10 season.
