EOCs receive senior level guidance from:

EOCs receive senior level guidance from "MAC Groups".

Explanation:

EOCs are the organization from which information and resources co-ordination takes place at the Incident Command Post to assist incident management. The function of EOCs is Coordinating plans and finding resource necessity; gathering, analyzing and sharing information or data; Providing coordination and policy direction.

MAC or Multiagency Coordination Groups are policy-setting bodies traditionally made up of administrators / executives of corporations or their designates to respond to an incident.