The article considers the theoretical foundations of public administration in the field of customs regulation and control in the context of the EU integration processes and the formation of the Customs Union. A study was made of the process of reforming the EU customs legislation in the context of the dynamic development of integration processes, and the role of customs control in ensuring economic security as a component of national security was analyzed, in particular, pointing to the example of Brexit implications.

Highlights

• The article is devoted to the analysis of EU customs control functioning for ensuring economic security within European integration trends landscape.
• The obtained results demonstrated the necessity of systemic approach and balancing in public management of customs control, including its legislative support, taking into account both the interests of EU as a whole and its individual member states, in particular in the context of economic security challenges.
• The practical significance of the research lies in outlining implications and challenges of the EU Customs Union in its role of providing economic security and enhancing public administration landscape for better effectiveness of integration processes.