Hans-Joachim Hacker is a German politician and former member of the Bundestag. He graduated from Martin Luther University Halle-Wittenberg in 1973 with a diploma in commercial law. Between 1973 and 1990, Hacker was head of the legal department at a state-owned food processing plant. In 1989, he joined the SDP, which merged with the SPD one year later. He was elected to the People's Chamber of the GDR in 1990 and automatically joined the Bundestag following German reunification. He lost the 2013 election and retired from the Bundestag.