Klusik was born in Niederwald, Germany, on July 30, 1956. On completing his studies in chemistry and gaining his doctorate from the Philipps University in Marburg, Germany, he began his professional career at Bayer’s Wolff Walsrode AG subsidiary in 1984 as a laboratory manager. He then worked as head of operations in various production areas at Wolff Walsrode. In 1990, he transferred to Bayer AG and was appointed head of the company’s crop protection production in Brazil. This was followed by assignments in the United States and Australia. In 1997, Klusik took charge of crop protection active ingredient production in Dormagen and Elberfeld, assuming global responsibility for active ingredient production at Bayer CropScience in Monheim from 2002. In early 2005, he transferred to Bayer HealthCare as head of the Technical Operations Committee. He was appointed to the Bayer HealthCare Executive Committee in July 2005 and was responsible for Product Supply. From November 2005 until his appointment to the Board of Management of Bayer AG, Klusik was a member of the Board of Management of Bayer HealthCare AG and became Labor Director as of October 2009. From March 2011 he was also Labor Director and member of the Board of Management of Bayer Pharma AG. Hartmut Klusik is married and has two children.