Matthias Sieverding has taken over the management of KraussMaffei Group’s Extrusion Segment from the departing Peter Roos. The 47-year-old engineer and trained tool maker has been working for KraussMaffei Group for almost two decades. In 2010, he took over the management of the Extrusion segment in the US. Dr Frank Stieler, chief executive of KraussMaffei,…