Founder and director of the private laboratory KDC Konservierung & Denkmalpflege Cons. in Olching (Germany). Since 1993, he is teaching Conservation Science at Technical University Munich. Since 1998. From 2001-2005 Stefan Simon was heading the “Building Materials” section at the Getty Conservation Institute, Los Angeles, before being appointed Director of the Rathgen Research Laboratory at the National Museums, Berlin in February 2005. Since 2009 he is Honorary Professor at X ́ian Jiaotong University (PR China). Prof Stefan Simon is elected member of ICCROM council (2009-2013) and vice chair of the council until 2011, and since 2008 he is President of the ICOMOS International Sci- entific Committee Stone (ISCS).