Moniek followed her training in Nutrition and Health at Wageningen University. She first obtained her Bachelor's degree and then completed her Master's degree with a specialisation in Epidemiology and Public Health. She performed her Master's internship at Deakin University in Geelong, Australia.
After obtaining het Masters degree in 2005, Moniek worked as a junior researcher at the Centre for Prevention and Health Care research within the National Institute of Public Health. She worked on several projects which were mainly focused on modifiable lifestyle factors and obesity. In 2011 she returned to the department of Human Nutrition at Wageningen University and worked as the study coordinator of the COLON study. Being involved in all aspects of this epidemiological study motivated her to start her PhD within the COLON study. In 2015 she wrote a grant proposal, that was funded by the Dutch Cancer Society, which resulted in Monieks PhD project.