Dr. Steffen Gross is Head of the Section Monoclonal and Polyclonal Antibodies, Laboratory Head as well as Scientific Assessor at the Paul-Ehrlich-Institut in Langen. After his Ph.D. degree in 1998 he had a postdoctoral position at the Institute of Cellular Signaling in the Netherlands. In 2001 he moved to Frankfurt and worked for several years at the University of Frankfurt as research group leader. Since 2005 he is working for the Paul-Ehrlich-Institut where he is responsible for assessments, batch control, inspections, research, scientific advice and regulatory. He is an expert in the field of cell biology , molecular biology and quality and preclinic of monoclonal antibodies, immunoglobulin and also has experience in the field of Batch release/CAP.