Besides his activities as a competitive sportsman, Klingenberg always focused on his occupational career. From 1999 to 2008 he worked in sports marketing as the head of marketing communications and sporting events of the Deutsche Telekom AG. He founded his own agency Klingenberg Sportconsulting GmbH in 2009, and worked from then on as an independent consultant. The main fields of activity are strategic consulting, conception and planning for companies and brands, as well as creative event and project management.