The Cologne-born central defender has signed a one-year contract in Hannover.
The season will start on the 18th September with two rather than the usual one game, with the Bundesliga starting the same night.
He will spend the next season at the HDI-Arena having fallen out of favour under current Effzeh coach Markus Gisdol.
The 24-year-old, who has previously had loan spells with Holstein Kiel and Jahn Regensburg in the 2. Bundesliga, has signed a two-year contract with die Lilien.
Both had been training with the first team since the restart in May, and each has now been handed a two-year contract.
The attacker returns to the club from Werder Bremen after 13 years away.
1. FC Heidenheim have further strengthened their midfield with the signing of Jan Schöppner from SC Verl, whilst they have also confirmed the return of David Otto.
Tom Krauß will stay in Franconia for the next two seasons, having made his debut for Julian Nagelsmann’s side at the back end of last season.
The experienced left-back has signed a two-year contract after leaving Arminia Bielefeld.
He is the second player to make the move this season, with Daniel-Kofi Kyereh having joined the Kiezkicker from Wiesbaden last week.