Klaus-M. Geske, born 1967, is a qualified physical education teacher. From 2000 to 2008, the elite level coach was national youth coach for the Flemish Table Tennis Association in Belgium. Alongside his coaching work in Hanover, Germany, he is also actively involved in coaching training at the regional and international level.Jens Mueller, born 1970, was coach to the German national deaf table tennis team between 1997 and 2004. The high school teacher has been working as a lecturer at the Bergische University in Wuppertal, Germany, since 2006.