This paper belongs to the domestic studies which try to connect the Romanian research to the current debates within the EU studies. The authors' aim is to analyze the aspects and the implications of the EU governance at the Member States' domestic policies level, as most of these policies are currently facing the challenges brought by the Europeanization process. Therefore, the theoretical framework selected is the theory of governance, focusing on the explanatory and analytical opportunities of two components – multi-level governance and governance networks; in this way, it is underlined the separation from the classic model of relation between the (multiplied) levels of political authority (supranational, national, subnational) and the exponential increase in the number and types of actors participating at the decisional process and implementation of European public policy. Within the selected case studies (environmental policy and education policy), the authors advance a research structure with the aims (a) to identify the relevant actors involved in the policy-making process of these policies, at all stages of its cycle; (b) to offer an explanation of the types of interactions between these actors, and (c) to identify the influence these interactions exert on the communitarization pronounced tendency of some EU policy sectors. The analysis is performed in terms of the Treaty of Lisbon (the selected policies being part of distinct categories of the Union competences) and it is oriented towards the national level of the making process of these policies.