Roelof Koekoek is a teacher in mathematics at the Delft Institute of Applied Mathematics (DIAM) of the faculty of Electrical Engineering, Mathematics and Computer Science (EEMCS) at the Delft University of Technology. He studied mathematics at the University of Groningen, where he also acquired his first degree teaching qualification in mathematics. In 1990 he received his PhD at the Delft University of Technology with a dissertation entitled "Generalizations of the classical Laguerre polynomials and some q-analogues."