Since 1991 Ms Rietdijk has worked as an epidemiologist at GGD Fryslân, a municipal health service, where she conducts epidemiological and other research into the health situation among the Frisian population. At Stenden University of Applied Sciences, Rietdijk is supervising several employees in the Social Work in Education and Creative Therapy departments in research and SPSS, in addition to supervising Creative Therapy students in writing their theses. As part of her work in the department, she is currently researching energy drink consumption among secondary school students in the Netherlands.