The 13th International CeBiTec Symposium “Synthetic Pathways in Biology & Chemistry – An International Young Investigator Conference”, will take place at the Center for Interdisciplinary Research (ZiF), Bielefeld University, from December 2 to 4, 2019. This symposium will focus on the fields of tailor-made biocatalyst design and applications thereof, combination of biocatalysis and chemocatalysis as well as synthetic biology towards multi-step syntheses from both, an academic and industrial perspective. In addition, emerging trends in chemistry and biotechnology with relevance also for the field biocatalysis, for example, flow-chemistry, machine learning and self-automatization will be addressed. This symposium is dedicated to young scientists and is intended to provide them with a platform to present their latest results in form of invited lectures, oral presentations and posters, respectively.