Complex sentence: He worked as a coach for Czesław Michniewicz while he was the head coach of Lech Poznań, and later deciding to become a coach for the Lech Poznan Youth Teams.
Split into simpler sentences: He worked as a coach for Czeslaw Michniewicz while he was the head coach of Lech Poznań. Later, Kryger decided to become a coach for the Lech Poznan Youth Teams.