Willi Rossak is professor of Software and Systems Engineering at Friedrich Schiller University Jena, Germany. He specializes in the modeling and development of distributed dynamic systems with a focus on the upstream tasks of the software life cycle. He received his Diploma and Ph.D. in computer science from the Vienna University of Technology, Austria. He has published more than sixty research papers on a wide variety of topics in software and systems engineering. He also works as a consultant for the IT industry and research institutions in many countries.