Honorary President of the International Reynard Society
Member of the Advisory Board van de serie Medieval Identities: Socio-Cultural Spaces (University of Hull + Brepols)
Advisor of the HERAproject 'Dynamics of the medieval manuscript'
Member of the editiorial board of the yearbook Tiecelijn
Member of the editiorial board of the journal Nederlandse letterkunde
Member of the project committee Middeleeuwse Verzamelhandschriften uit de Nederlanden (Huygens Instituut, KNAW)
Member of the board of the Stichting Nederlandse Literaire Klassieken