Steffen Gross has extensive experience in molecular and cell biology. Mr. Gross joined the Paul-Ehrlich Institute in 2005 and became Head of the Section monoclonal and polyclonal antibodies in 2012. He is involved in the assessment of the quality and preclinical issues for marketing authorization applications, scientific advices and clinical trial applications. Until 2012 Mr. Gross was laboratory head of the section monoclonal and polyclonal antibodies and involved in testing of immunoglobulins, immunsera and monoclonal antibodies as well as in planning and performing research projects. Due to his experience he also often supports inspections as an expert for certain products. Before joining the Paul-Ehrlich Institute he worked in the Netherland for three years as a postdoc. During this time he had been working several months at the National Institute of Health in Bethesda. After his return to Germany he became a research group leader at the University of Frankfurt.