Michael is the creative mind and founder behind Goalkeeping Development. As a former shot-stopper (for Hamburg among others), sports scientist, A-license coach and current first-team goalkeeping coach at Bundesliga club FC Bayer Munich, he has made it his mission to develop the art of goalkeeping. In over 300 games in Bundesliga, Champions League, Europa League and international matches, he has worked with top goalkeepers such as Baumann, Çakir, Kobel, Casteels and Schwäbe. Recently, in addition to his 14 years of work at TSG Hoffenheim, he coached the goalkeepers of the Turkish national team. Since 2023, Michael is the goalkeeper coach for the professionals of FC Bayern Munich.