Career
Hermann took over Bayer Leverkusen from 1 June 1991 to 30 June 1991, 8 April 1995 to 10 April 1995, and 28 April 1996 to 30 June 1996. He managed Bayer Leverkusen II from 17 February 2003 to 14 May 2003. On 24 November 2015, Hermann became the interim manager of Fortuna Düsseldorf.
As of 19 April 2013.