He founded the wi-mobile Research Group in 2001. As an internationally recognized expert he was involved in numerous projects. Among other things he headed the National Roundtable M-Payment of the German mobile operators and banks and served as a member of the M-Enterprise advisory body for the German Ministry of Economics and Technology. Besides his research work he serves the community as spokesman of the board of the German SIG of mobile business researchers, author/editor of 11 books and numerous research articles, keynote speaker and supervisory board member of a publicly traded company. He is frequently asked to comment for the media, from German national radio/TV to the NYT, and advises national and international corporations in strategic mobile business and m-commerce issues.