Critical infrastructure determines the survival and well-being of all citizens. The main purpose of its protection is to maintain the continuity of providing key services for the state. The mission and responsibility of CI participants, coordination of activities are very important things. Understanding this is the basis for the effectiveness and sustainability of this system. CI operators are people with the best knowledge about the specifics and functioning of critical infrastructure items (facility/installation/device/service). They also have the conditions to eliminate threats and reduce their negative effects. In this article provides space for entities designated to protect CI, i.e. the person responsible for maintaining contacts and the plenipotentiary for critical infrastructure.