Claus-Michael Lehr is a professor of Biopharmaceuticals and Pharmaceutical Technology at Saarland University and head of the Drug Delivery department at the Helmholtz Institute for Pharmaceutical Research Saarland (HIPS). As a spin-off of his research, Prof. Lehr has been involved in founding two companies: Across Barriers and PharmBioTech, both located at the StarterCenter of Saarland University. The international conference "Biological Barriers", which he initiated 20 years ago, brings around 200 experts from all over the world to the Saarbrücken campus every 2 years and will take place for the 13th time in August 2019. Professor Lehr's research deals with in vitro models of epithelial barriers and modern drug delivery systems ("nanopharmaceuticals"). He is co-editor of the European Journal of Pharmaceutics and Biopharmaceutics (EJPB). The English journal "The MedicineMaker" has counted him among the 100 most influential drug researchers worldwide three times in a row since 2015. • SINCE 2009 Co-founder of HIPS and head of the Drug Delivery department • SINCE 1995 Professor (C4), Biopharmacy and Pharmaceutical Technology, Saarland University • 1993-1995 Professor (C3), Pharmaceutical Technology, Philipps University, Marburg • 1992-1993 Research Associate, Leiden/ Amsterdam Center for Drug Research, NL • 1991-1992 Postdoc, University of S. California (USC), Los Angeles, USA • 1987-1991 Dr re. nat., Center for Bio-Pharmaceutical Sciences, Leiden University, NL