Hartmut Geiger studied chemistry and biochemistry at the Universities of Karlsruhe and Witten/Herdecke in Germany. He received his PhD from the Max-Planck-Institute for Immunobiology in Freiburg, Germany in 1999. From 1999 to 2002 he was scientific research fellow at the University of Kentucky, USA with expertise in stem cells, genetics and aging. From 2002 to 2008 he was Assistant Professor at the Division of Experimental Hematology, Cincinnati Children’s Hospital Medical Center, University of Cincinnati, USA. Since 2008 he has been Associate Professor at the University of Cincinnati, USA and Professor at the University of Ulm, Division of Dermatology and Allergic Diseases, Germany. His main research interest lies in the molecular biology of aging.