Since April 2016 Christof is responsible for Public Affairs at Deutsche Glasfaser Holding, a German FTTH player. Deutsche Glasfaser plans, builds and operates open-access fiber networks for private households, businesses and public institutions. From 2000 onwards, he was Head of Regulatory Affairs at QSC AG, a German business services and IT service provider. Christof started his career in telecoms with Talkline GmbH, a German long distance and mobile service provider in 1997.