Numerous studies, using the Europeanization theoretical framework, have looked into why and how EU-supported norms and policies are adopted in non EU-Member States, focusing either on the mechanisms through which they are diffused or on the local actors' responses to such demands. However, the practical implementation of such norms and policies in third countries has only received modest attention in academic and policy-related studies. Indeed, the “law in the books” is not necessarily the “law in action”. Going beyond the top-down approach that have extensively characterized Europeanization studies, this dissertation will operate a return to the “mundane face” of Europeanization and looks into how expert interactions matter for EU law implementation. It shows that those experts are highly enthusiast and willing to implement EU demands and adapted them to fit in their domestic context. They act as policy champions and show high degrees of policy saliency when fulfilling their tasks. Nevertheless, those champions operate in a difficult administrative and political environment that complicates EU law compliance, with low administrative capacity, high degree of staff turn-over, shortages of knowledgeable staff and political actors that might hinder EU law implementation if it is too costly or in contradiction with domestic vested interests.