Harry Dost worked at the CIOS in Overveen and at the Sports Academy as a teacher for sports in secondary school. Furthermore, he worked as an instructor at the Saxion University in Enschede and the IAPF in Papendal. Since 1983, he has been fitness coach at FC Twente Enschede. He worked with numerous soccer coaches, including Korbach and Rijvers, and coached the women's team of FC Twente. He gives lectures on coaching with an emphasis on fitness training aimed at youth players, fostering talents, periodization, nutrition, etc. and has published books and articles on these topics.

Peter Hyballa is a soccer coach certified by the German Football Association (DFB). He also holds the UEFA Pro Licence. He was manager of Alemannia Aachen and Sturm Graz and is currently training the U19 team of Bayer Leverkusen. He was German U19 league runner-up and German U19 Cup runner-up with Borussia Dortmund in 2009. Peter Hyballa gives advanced training for soccer coaches in Germany and abroad. In addition, he is a freelance author for online seminars and for the DFB journal Fussballtraining.

Hans-Dieter te Poel is a soccer coach certified by the German Football Association (DFB) and holds the UEFA Pro Licence. He has worked as a trainer in competitive soccer for many years. As a player, he played in Cologne, Gelsenkirchen, and Bottrop among others. In addition, he is associate lecturer for soccer at the German Sport University in Cologne and worked at state youth training centers in Essen and Straelen and federal youth training centers in Dortmund and Munich. He has written books and articles for numerous journals.