Reutershahn began his coaching career as assistant coach by
Bayer Uerdingen and was a short time in the 1995–96 season Caretaker Head Coach of the club. After the relegation was moving back as assistant coach of
Bayer Uerdingen and signed in summer 1997 a contract as assistant coach of
Hamburger SV. Reutershan was than for six years assistant coach of the Hamburger SV and was named after one year without a job as assistant of
Friedhelm Funkel at
Eintracht Frankfurt. After the resigning of Funkel, Reutershahn left the club and signed a contract as assistant manager with
1. FC Nürnberg. Following the departure of Nürnberg's manager
Dieter Hecking in December 2012, Reutershahn took charge of the Bundesliga team along with
Michael Wiesinger. On 7 October 2013, the duo was dismissed after a 5–0 defeat against Hamburger SV. On 10 March 2014, Reutershahn became assistant manager of
VfB Stuttgart. ==Personal==