von Ahlen started his coaching career in the youth section at
Bayer Leverkusen in 2007 before moving to the youth section at
Hamburger SV in 2008. He then signed a two–year deal on 18 April 2011 to become the new head coach of
Arminia Bielefeld starting at the beginning of the
2011–12 season. However, his tenure ended prematurely on 20 September 2011. He failed to win any of his 11 competitive matches. He then became an assistant coach for
Kapfenberger SV Then he became an assistant coach with 1860 München He was given the mandate for the rest of the
2013–14 season. Von Ahlen once again became head coach of the first team after Moniz was sacked. He was sacked on 17 February 2015. In July 2016 he became manager of the Under-19 squad of
Bayer Leverkusen. In January 2022 he became new manager of
Bonner SC. On 3 May 2022 he was sacked by Bonner only to be named new manager of
Fortuna Köln one hour later. ==Coaching record==