Lieberknecht also represented Germany nine times at the U-21 level and was part of the German squad for the 1993 FIFA World Youth Championship in Australia.

At the end of the 2007–08 Regionalliga season the club was in serious danger of missing out on qualification for Germany's new nationwide third-tier league 3.

When Benno Möhlmann, at the time the manager of Eintracht Braunschweig's first team, stepped down in May 2008, Lieberknecht was named his successor.

Liga qualification on the last match day of the season, but since then has started a steady climb back up the ladder of German football.

[6] Lieberknecht was widely recognized in the media both in Germany and abroad as one of the key figures in the club's resurgence after years in the second and third tier.