Since April 2016 Christof is responsible for Public Affairs at Deutsche Glasfaser Holding, a pure German FTTH player, constructing and operating fiber access networks mainly in rural areas. 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.