Schlüsselburg lives in Ilsfeld , is married and has 3 children (Isabel, Gabriela and Sven Schlüsselburg ).
He started riding at Helga Köhler`s stable, he prepared many horses for auctions, which he also presented himself. After completing his school education, he learned body and vehicle construction, but then decided to go horseback riding. He was stationed as a sports soldier at the Bundeswehr Sports School in Warendorf , where he and Michael Rüping were among the first mounted soldiers. For many years he trained jumping horses for the Ribhege stable in Werne. During this time he also got to know the Schäfer family from Wolfschlugen , for whom he worked from 1975 to 1991. After that, Schlüsselburg went toEbersbach an der Fils independently . A few years later he moved to Ilsfeld , where he runs a tournament stable. As the successor to Dietmar Näher , Schlüsselburg is a jumping trainer of the Württemberg Equestrian Sports Club.