Prof. Koenders studied structural engineering and offshore technology at the faculty of Civil Engineering at Delft University of Technology in The Netherlands and received his doctors degree in the field of volume changes of high performance materials in 1997. After that he worked five years in a large Dutch offshore and construction company as a project and innovation manager. From 2003 on he was employed at Delft University of Technology as an assistant and associate professor being involved in many research projects such as explosive spalling of concrete due to fire exposure, durability of infrastructure, modelling hydration of sustainable cement systems and the development of models for the prediction of the mechanical properties of concrete with recycled aggregates. From 2011 to 2014 he was a visiting professor at the Federal University of Rio de Janeiro (UFRJ) at the NUMATS center for Sustainable and Durable Materials Development in Construction.
Since 2014 he has been a professor at the Institute of Construction and Building Materials, TU Darmstadt.