Dr Hijmans is Chairman of the Litigation chamber and member of the Board of Directors of the Belgian DPA. He is affiliated to the Brussels Privacy Hub, member of the Meijers Committee and teaches at various universities. He is the author of The EU as Guardian of Internet Privacy: The Story of Art 16 TFEU (Springer 2016). Until April 2019, he delivered services on a structural basis to the Centre for Information Policy Leadership and Considerati. For 12 years he served at the offices of the EDPS, inter alia as head of unit policy and consultation. Untill 2004 he held a post as member of cabinet/legal secretary at at the Court of Justice of the EU in Luxembourg. Furthermore, Hielke was counselor at the Directorate of Legislation of the Ministry of Justice in The Hague.