DeepL translation:

Hacker attended the Carl-Platz-Schule in Herzogenaurach from 1974 to 1978 and then transferred to the Gymnasium Herzogenaurach, where he graduated in 1987. After completing his military service in Regensburg, he studied mathematics and physics to become a secondary school teacher. Between 1995 and 1997, he completed his teacher training in Fürth and Langenzenn.

He then worked as a research assistant in the Department of Didactics of Physics at the Institute of Physics at the University of Erlangen. In 1999, he moved into the teaching profession and taught at a grammar school in Langenzenn. In 2001, he returned to the University of Erlangen and became an instructor for student teachers in the subject of physics education. In 2002, he received his doctorate (Dr. rer. nat.). From 2005, he was a physics teacher at Hardenberg-Gymnasium Fürth.

He joined the SPD in 1990 and was first elected to the Herzogenaurach town council in 1996. From 1998 to 2004, he was deputy chairman of the SPD parliamentary group and from 2004 to 2008, chairman of the parliamentary group. He has been First Mayor of the town since May 1, 2008. He has also been a member of the Erlangen-Höchstadt district council since 2008. He was re-elected in 2014 and 2020.