Degree in Architecture from TU Delft in 1988. Practicing architect 1988-2001. Teaching and researching at the TU Delft since 1990. She developed her expertise in the documentation and analysis of architectural projects, notably: A Hundred Years of Dutch Architecture (Dutch 1999, English 2002, Chinese 2008). Willemijn is the co-author of the Zakboek voor de Woonomgeving (2001) and editor of Het ontwerp van het kleine woonhuis (2005) and Architectuurgids Delft (2011).