Marc Lankhorst advisor on the development of NORA, the Dutch government reference architecture. This entails both general advice on the direction of its further development and specific assistance in the use of ArchiMate for NORA's underlying knowledge model. Until recently, Marc was also a member of the Architecture Council of the so-called "Manifest Group", a collective of (operational) government organizations such as the tax administration, social security instutitions, the chambers of commerce, immigration services, and more. Finally, Marc have managed several innovation projects with government organizations, on topics such as integrated e-government services and multi-channel management.