The article explores the concept of the «deep state» as a key element of ensuring sustainable public administration and national security in war and peace. The author examines global and regional development trends that affect the formation of national security and analyses the mechanisms of power and governance in different countries. Particular attention is paid to the role of informal and closed networks in influencing official policy, which allows for a deeper understanding of the sources of information wars and manipulation of public opinion. The relevance of the study is driven by the need to build a transparent, fair and democratic society, as well as to strengthen democratic institutions and protect the rights and freedoms of citizens. The analysis of the deep state allows us to identify the interconnections between state institutions, the military, intelligence services and big business, which often remain outside democratic control. The author notes that the study of the deep state is important for the protection of democratic values, increasing transparency, accountability and efficiency of governance. Particular attention is paid to the influence of the deep state on the information space and the mechanisms of manipulating public opinion through the media. Understanding these processes contributes to the development of critical thinking and the protection of citizens' rights and freedoms. In the context of globalisation, the concept of the deep state is seen as an important factor influencing international relations, trade policies and economic alliances. The study of this phenomenon helps to predict changes in global politics and the economy, which is important for the development of long-term national security strategies. The term «deep state» is used to describe a network of influential individuals or organisations that can exert significant influence on public policy beyond democratic control. This concept is actively discussed in political debates, causing controversy over its role and influence on political processes.