After his studies in computer sciences at the Friedrich Alexander University of Erlangen-Nürnberg, Marcus Kesseler did research for ten months in 1991 in the central research and development department at Siemens AG in Munich. From 1992 to 1995 he was assistant professor to the Chair for Artificial Intelligence at the University of Erlangen-Nürnberg. In 1995 the research topic for his incomplete dissertation became the first product of SCHEMA Group.
For 20 years, Marcus Kesseler has been one of the two CEOs and chief partners of SCHEMA Group. He is responsible for R&D and the Solutions department.