Holger Steiner, born in 1982 in Bonn, Germany, studied Computer Science and Autonomous Systems at the Bonn-Rhein-Sieg University of Applied Sciences (BRSU) and graduated with the Master of Science degree in 2008. Afterwards he started working as a research scientist at the Institute for Occupational Safety and Health of the German Social Accident Insurance (DGUV), where he continued working on his master thesis topic and developed intelligent sensor systems for the acquisition of physiological data and the evaluation of multicausal strain at mobile workplaces. In 2009, he returned to the BRSU as a research scientist at the Institute for Safety and Security Research. He was involved in several successfull research projects in the field of optical sensor and camera systems. In 2011, he became an external member of the DFG Research Training Group 1564 “Imaging New Modalities” at the University of Siegen and began working on his Ph.D. topic, the reliable detection of human skin using multispectral imaging in the short-wave infrared spectrum. He finished his Ph.D. in 2016 and left the University to work as a research engineer in the industry.