After his civilian service in the Workers' Welfare Association in Villingen-Schwenningen in 1986, he studied Modern German Literature and Media Studies as well as Economic and Social History in Marburg. Since 2005 he was a constituency employee of Wolfgang Gehrcke, member of the Bundestag. From 2006 to 2011, Kessler was an honorary city councilor of the city of Frankfurt. He became a member of the Bundestag after the 2017 German federal election.[2] He is a member of the Health Committee.[3] For his group he is spokesman for health policy.[4]
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