With his publications, Johannes Siedersleben has influenced the topic of software architecture in Germany and beyond. He advises QAware in all areas of software engineering. Johannes Siedersleben studied mathematics and computer science in Karlsruhe and Grenoble. He was chief architect at sd&m, Munich, and later at T-Systems. At the Rosenheim University of Applied Sciences, he developed the study focus “Software engineering”. He is the publisher of “Software Technology – Practical Knowledge for Software Engineers” (Hanser, 2002) and author of “Modern Software Architecture” (dPunkt, 2004).