Marga de Jager currently serves as a member of the Supervisory Board at KPN and as Chair of the Supervisory Board at UVM verzekeringsmaatschappij (Unigarant N.V.). Since 2006, Marga de Jager has held multiple leadership roles at ANWB, including CEO and director of various divisions. Additionally, Marga de Jager is the Chair of the Mobiliteitsalliantie and serves on the advisory council for KWF Kankerbestrijding and the TNO Advisory Council on Mobility. Other appointments include being a member of the Board of Trustees for Fonds Slachtofferhulp and the SWOV Road Safety Research Board. Marga de Jager has held previous positions such as Chair of the Revolving Fund Alblasserwaard Vijfherenlanden and a member of the Supervisory Board for de Vereende. Marga de Jager's education includes programs at prestigious institutions such as Columbia University and Erasmus University Rotterdam, along with a background in Chemical Technology.