Company management

The company has been managed for six generations by the family members and offspring of the founder and namesake Wilhelm Karrenberg. In 1989, following the sudden death of his father-in-law, Friedrich Karrenberg, Wolfgang K. Schlieper was appointed as the managing partner. His son, Robert Schlieper, carries on the family tradition in his wake.

Who we are, what we do and what drives us. That is WILKA!


Robert Schlieper
Managing Partner
Since 2016 continues Robert Schlieper managing the family business in the 6th generation. The values tradition, quality and innovation have the highest priority for him. “We are growing long-term, qualified, but not at all cost. Mutual respect and straightforwardness are for us of high significance, in order to ensure the satisfaction of our customers.”