If the transformation towards a sustainable economy is to succeed, it is essential that circular economy aspects are integrated into product design and optimization. However, companies often lack the necessary expertise to modify the design of their products accordingly in their business operations. The e-CirP project (Embedding Circular Economy into Product Design and Optimization) aims to close this gap: master students across Europe are learning how to integrate the principles of a closed-loop economy into product design by analyzing real industrial cases. Modern teaching concepts, such as virtual reality or flipped classroom learning, are being used. Companies and students - the specialists of tomorrow - are thus brought together at an early stage and a modular training package is developed.