The doc.funds CATALOX initiative brings 10 young researchers together to study the mechanisms and applications of so-called oxidoreductases. These biocatalysts are the largest class of enzymes and play an important role in energy metabolism. The associated doctoral program is part of a cooperation between the Graz University of Technology and the University of Graz in the supporting program "NaWI Graz". Within the framework of scientific education, the doctoral students benefit from the international reputation of the working group leaders involved and from the focused research projects. The close cooperation with the Austrian Center for Industrial Biotechnology (ACIB) adds value for the PhD students, especially with regard to the possible applications of the findings. The interdisciplinary approach offers junior researchers the opportunity to prepare for attractive career options in research and development. The unique environment allows for in-depth knowledge in the core areas of biocatalysis and biotechnology - from organic synthesis, mechanistic enzymology, enzyme engineering, structural biology to process engineering.