Jörg Hinrich Hacker (born 13 February 1952 in Grevesmühlen, Mecklenburg) is a German microbiologist. From 2008 to 2010 he was president of the Robert Koch Institute. Since 2010 he has been president of the German Academy of Sciences Leopoldina. He is the editor-in-chief of the International Journal of Medical Microbiology.
Hacker studied biology from 1970 to 1974 at the Martin Luther University in Halle and obtained his PhD in 1979. From 1980 to 1988 he worked as a junior researcher at the University of Würzburg, where he obtained his habilitation in microbiology in 1986.
From 1988 until 1993, Hacker was professor of microbiology at the University of Würzburg. In 1993 he moved to the chair for Molecular Infection Biology, which he held until 2008. From 2003 to 2009, he was vice president of the Deutsche Forschungsgemeinschaft. From March 2008 to March 2010, he succeeded Reinhard Kurth as president of the Robert Koch Institute. On 1 October 2009, Hacker was elected president of the German Academy of Sciences Leopoldina. The solemn inauguration ceremony took place on 26 February 2010 and his official starting date was 1 March 2010.
His main research interests are the molecular analysis of bacterial pathogens, their spread and variability, as well as their interactions with host cells. From 2001 to 2008 he served as co-coordinator of the BMBF programs PathoGenoMik and PathoGenoMik Plus.