Christoph Schallenberg is Vice President of Sales & Service Consumer in the sales channel Internet of Telekom Deutschland, since April 2010. One of his issues is carry forward the performance marketing and programmatic buying and therefor establish the technical requirements. After different executives positions of the publishing group Holtzbrinck and Möbel Walther in the ecommerce sector, Christoph Schallenberg has switched to Deutsche Telekom in the middle of 2002. As a Senior Manager for T- Online International AG, he was responsible for conception, marketing and enhancements of the T-Online Shop as well as for the supervision on the ecommerce participation . Afterwards he lead the set-up of the marketplace of Electronic Scout 24 as the executive director of Scout24 Service GmbH for about two years. Since 2007 he worked for T-Mobile Deutschland as the head of ebusiness.