Daniel Eßer studied chemistry at the University of Applied Sciences Bonn Rhein-Sieg, in Rheinbach, Germany, with a focus on pharmaceutical and analytical chemistry. He received his Ph.D. in pharmaceutical and medicinal chemistry at the University of Düsseldorf, Germany. During his postdoc at the Institute of Pharmaceutical and Medicinal Chemistry of the University of Düsseldorf, he established a nanoLC–MS system. In 2013 he joined YMC Europe as a product specialist for analytical chromatography. Since 2017, he has been responsible for YMC’s analytical (U)HPLC column portfolio as product manager for analytical chromatography.