Willem Jan originally worked at the TU/e and Philips Research on system architectures. But soon started one of the first ISP in the Netherlands (Internet Access Eindhoven) in 1992, using FreeBSD. FreeBSD has stayed with him and his companies ever since.
Not a typical expert in anything, but able to find his way is just about any problem, be it networking, assembly language, or business engineering. After over a dozen companies he now runs a data-center and is co-owner of a cloud company (using Linux). Open source is his preferred way of doing things.
By: Willem Jan Withagen