Post-liberal, hybrid peace, a new model of peacebuilding, aims to step away from the top-down imposition of liberal peace. In order to recognise the local, the new model considers the interaction between the international and the local as a dynamic power interaction, through which the means and ends of peace can be mediated. Yet, it has already been criticised for its theoretical underpinnings which would, ultimately, impede it to achieve its objectives. This thesis aims to determine the concrete impacts of the elements pinpointed by the critiques. It adopts an alternative focus on both the programme itself and the affected population’s perspectives. Through an instrumental case study of the EU Peace III Fund’s peacebuilding in Northern Ireland and the Border Region, the thesis highlights that these critiques can take different, practical forms. It enables to unveil the importance of exploring the affected population’s perspectives, of the initial context as well as the external peacebuilder’s belief that it knows, still, what is best over the affected populations.