As a 17-year-old girl, Ivonne began her adventure in 1976 at Jan Kooijman, then the youngest notary in the Netherlands.
In July 1983, she temporarily stopped working because of her pregnancy, but in 1988 she returned to her familiar workplace at Jan Kooijman. Since then, she still works here with great pleasure, 5 days a week. Ivonne takes care of the administrative processes surrounding entries in the land register, registration, central register of wills and royalties.
She spends her free time with her husband and the household, hiking with their dog Kyan (husky) and finds relaxation in puzzling, especially with numerical codes.