Ellermeijer has been affiliated with the University of Amsterdam since 1977, where he has served as senior university lecturer on Science Didactics since 1982. He has also served as director of the University of Amsterdam's AMSTEL Institute since 1997. Ellermeijer is also President of the Groupe Internationale Recherche Education Physique (GIREP). In 2005, he was appointed professor by special appointment of Secondary Education Science Curriculum Innovation at the University of Amsterdam's Faculty of Science.
The International Commission on Physics Education reports to the International Union of Pure and Applied Physics (IUPAP). See the reference below for additional information