From 10 November 2007, Dammeier coached Arminia Bielefeld's second team until the end of the season. Dammeier has successfully completed the 14-day training course for a Trainer-B-Lizenz for this job. On 10 December 2007, after the dismissal of
Ernst Middendorp, he became interim coach of Arminia, which he only oversaw in the last first round game against
VfB Stuttgart (2-0); after the game,
Michael Frontzeck was introduced as the new head coach. On 20 March 2008, Detlev Dammeier became Arminia Bielefeld's new sporting director, succeeding
Reinhard Saftig, whom the club had previously fired. Dammeier signed a contract until the end of June 2009. He also held the post of coach of the second team of Arminia Bielefeld until the end of the season. During the winter break of the
2008–09 Bundesliga, the club announced that Detlev Dammeier's contract had been extended until 30 June 2011. On 30 March 2010, Arminia Bielefeld announced that Dammeier had been relieved of his duties. From September 2011 to the summer of 2013, Dammeier coached the
state league team Spvg
Steinhagen. In the summer of 2013, Detlev Dammeier was a scout at
RB Leipzig, where he was primarily responsible for analyzing opponents. On 17 February 2014,
SC Preußen Münster announced that Dammeier would take over the sporting management of the club. After a controversial interview, Dammeier had to vacate the post on 31 March. From 1 July to 2 October 2017, Dammeier coached the club
Lupo Martini Wolfsburg from the
Oberliga Niedersachsen. For the 2018/19 season, Dammeier took over the coaching position at the
Westfalenliga Delbrücker SC. ==Personal life==