The article stretches the definition of "computer science professor" a bit too much.
Pieper has a Wikipedia article [https://en.wikipedia.org/wiki/Roel_Pieper]. It describes him as primarily an "IT-Entrepreneur". He seems to be mostly an investor/business type.
And (from the WP article):
> On 1 September 1999 Pieper was appointed as a professor of Electronic Commerce, a newly created chair at the faculty of informatics and technology management of the University of Twente. Pieper ended as a professor of business administration and corporate governance at the university of Twente in 2013.
Pieper has a Wikipedia article [https://en.wikipedia.org/wiki/Roel_Pieper]. It describes him as primarily an "IT-Entrepreneur". He seems to be mostly an investor/business type.
And (from the WP article):
> On 1 September 1999 Pieper was appointed as a professor of Electronic Commerce, a newly created chair at the faculty of informatics and technology management of the University of Twente. Pieper ended as a professor of business administration and corporate governance at the university of Twente in 2013.