Stefan Happe has extensive experience in the media industry, beginning as a Verlagskaufmann and Ausbilder at Zeitungsgruppe WAZ from September 1988 to March 1993. Following this role, Stefan Happe worked as a Mediaplaner at Optimedia from April 1993 to September 1996, and subsequently at MediaCom from October 1996 to September 1998. Moving into a leadership position, Stefan served as Media Director at M&MC from October 1998 to June 1999. Since July 1999, Stefan Happe has held the position of Geschäftsführer at CROSSMEDIA Deutschland, demonstrating a long-term commitment and significant contributions to the field.