Mainz 05 is set to sign Posch. The 23-year-old midfielder is expected to join the 05ers in the upcoming season. Posch is a key signing for Mainz 05. The midfielder comes from the youth academy of 1. FC Nürnberg and has already gained experience in the 2. Bundesliga. Posch is expected to play a key role in the team in the upcoming season. The 05er coach will prepare the team for the Champions League in the upcoming season. The Mainzers will focus on building their strengths and improving their weaknesses in the upcoming season. Posch will play a key role in the team and support the Mainzers.