Dennis has been advising German and foreign clients in distribution, IT-/IP, insurance and data protection matters for more than a decade in the Frankfurt office of Melchers, Germany. His data protection practice focuses on the design and use of large data bases, particularly for advertising purposes, on a national as well as transnational level. He regularly advises as well on the management and use of HR-data bases, including internal investigations, outsourcing and shared service-projects. Dennis publishes and lectures regularly in data protection and advertising matters. Recent publications include a paper on the use of personal data for advertisement purposes as perceived by German administrative courts as well as an in depth analysis of sponsoring contracts, recent lectures were particularly concerned with the transfer of personal data from the EU to the US.