Complex sentence: After his retirement from competition, Hohn became a coach and since 1999 he has worked for SC Potsdam, the successor of ASK Vorwärts Potsdam, where he started his career as a sportsman.
Split into simpler sentences: After his retirement from competition, Hohn became a coach. Since 1999 he has worked for SC Potsdam, the successor of ASK Vorwärts Potsdam, where he started his career as a sportsman.