Currently Dirk Jan holds the Chair of the Sanquin Foundation. Sanquin operates the national blood supply system in the Netherlands, houses a world leading research institute on immunology, hematology and transfusion healthcare and owns and manages several businesses in products and services in the area of plasma based pharmaceuticals, reagents and diagnostics. Sanquin stimulates innovations through its Sanquinnovate Inc
Since July 2018, Dirk Jan has been the chair of the Governing Board of the EIT. Dirk Jan has several supervisory roles, in Gasunie BV (gas transport services in the Netherlands), FMO (the Dutchdevelopment bank), CPB (Dutch Bureau for Economic Policy Analysis) and TRADESPARENT BV (a startup/scaleup in data management software).
In his previous career, Dirk Jan held high-level positions in the Dutch diplomatic and civil service, as secretary general of the MFA, permanent representative to the UN in New York and ambassador to the People's Republic of China. In academia, he served as the (executive) president of Delft University of Technology.