Konstantin Schaible works in staff position of the head of marketing and sales at the Stuttgarter Straßenbahnen AG and is in charge of several interdisciplinary tasks. Konstantin is an expert in the German electronic ticketing (VDV-KA) and has over 5 years of experience in check in - check/be out systems. He gained his experience as project leader of two in/out-projects from scratch up to the production state.