As of 2021, Prof. Katrien Keune is appointed at the John van Geuns chair.

Over time, the following professors have been appointed:

Prof. S. (Sander) Woutersen (2014-2019).

Prof. A.M. (Fred) Brouwer (2006-2011).

Prof. W.J. (Wybren Jan) Buma (1999-2005).

Prof. C.J. (Kees) Elsevier (1995-1999).

Prof. M. (Max) Glasbeek (1988-1995).

Prof. J. (Jan) van der Elsken (1975-1985).

Prof. G.J. (Gerrit Jan) Hoijtink (1970-1975).