Markus Völter, Alexander Schmid and Eberhard Wolff work as IT consultants, trainers and office managers for MATHEMA AG in Germany. They share a professional interest in new software development technologies, distributed systems and have experience of component-based development and enterprise architecture obtained during many development projects of all kinds and size. The three of them are regular speakers at conferences. Markus Völter is an active member of the international pattern community.