Dr. Jimmy Czimek is a certified sports teacher and trainer. He is the former co-trainer of the German women'e(tm)s volleyball national team and head coach in the 1st division Volleyball Bundesliga. In 2010, he began working at the German Sports University Cologne as a senior student counselor. He also lectures in the LFG Volleyball at the Institute for Mediation Competence in Sports. Since 2013 he has been the coordinator and main instructor for the volleyball sports game at the Cologne Trainer Academy. He has also trained the women'e(tm)s national league team DSHS SnowTrex Köln for many years. Athanasios Papageorgiou is a certified sports teacher.

From 1970 to 2009, he lectured at the former Institute for Sports Games at the German Sports University in Cologne. He has had numerous successes as a Bundesliga men'e(tm)s coach and as a coach of the German national volleyball team for the disabled. For almost three decades, he was a trainer at the DVV (German Volleyball Association) as well as a coordinator and main lecturer for volleyball at the Cologne Trainer Academy. Since 1993 he has been a trainer for the International Volleyball Federation and the International Volleyball Federation for the Disabled. He has published numerous textbooks, scientific articles, and educational films on beach and indoor volleyball.