MAC Groups Do Not Replace EOCs or Dispatch: Key Roles & Differences Explained

Table of Contents#

1. What Is a MAC Group, Exactly?
2. Core Roles of EOCs and Dispatch Organizations 2.1 Key EOC Functions 2.2 Key Dispatch Organization Functions
3. Why MAC Groups Never Replace EOCs or Dispatch
4. How All Three Teams Collaborate During Incidents
5. Common MAC Group Misconceptions Debunked
6. Final Takeaways
7. References

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What Is a MAC Group, Exactly?#

A MAC Group (sometimes called a Multiagency Coordination Entity or Policy Group) is a temporary or standing body of senior officials, including elected leaders, agency administrators, and cross-jurisdictional emergency management directors, aligned with FEMA’s National Incident Management System (NIMS) framework.

Under the NIMS Third Edition (October 2017), “Multiagency Coordination” was redefined as the umbrella term for the entire NIMS Command and Coordination component, which includes four structures: the Incident Command System (ICS), Emergency Operations Centers (EOCs), MAC Groups, and the Joint Information System (JIS). MAC Groups are one element within this larger coordination framework, not a standalone replacement for any of the others.

MAC Groups operate exclusively at the strategic, off-incident level, and their core purpose is to resolve resource conflicts and set cross-regional response priorities during large, complex events that span multiple jurisdictions or involve multiple concurrent incidents. They do not oversee on-scene tactical operations or direct first responder actions.

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Core Roles of EOCs and Dispatch Organizations#

EOCs and dispatch are permanent, local response entities that serve distinct, frontline and operational support roles unrelated to the high-level policy work of MAC Groups.

Key EOC Functions#

EOCs are physical or virtual centralized coordination hubs activated for local and regional incidents. Their core responsibilities include:

• Collecting, analyzing, and sharing real-time incident data with on-scene Incident Commanders (ICs) and local agencies
• Processing resource requests from on-scene response teams
• Tracking local resource availability (personnel, equipment, supplies)
• Communicating incident updates to elected officials and the public
• Implementing policy guidance shared by MAC Groups during large-scale events

Key Dispatch Organization Functions#

Also called Public Safety Answering Points (PSAPs), dispatch teams are the first point of contact for all public safety requests, and operate 24/7/365. Their core responsibilities include:

• Triage of 911 and non-emergency public safety calls
• Dispatch of appropriate first responder units (fire, police, EMS) to incident scenes
• Real-time tracking of on-duty responder locations and status
• Relaying critical information between field teams and Incident Command
• Coordinating mutual aid response for small, local incidents

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Why MAC Groups Never Replace EOCs or Dispatch#

The three entities operate at entirely separate levels of the emergency response chain, with no overlapping authority or mandate. The table below summarizes their key differences:

MAC Groups have no authority to override decisions made by local EOCs or dispatch teams, and cannot direct on-scene response actions. Their only role is to allocate shared, cross-jurisdictional resources and set high-level policy guidance that local teams can choose to implement as fits their on-the-ground needs.

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How All Three Teams Collaborate During Incidents#

To illustrate their complementary roles, consider the example of a regional hurricane impacting three adjacent counties:

1. A resident calls 911 to report a flooded home: dispatch triages the call and sends a local swift water rescue team to the scene.
2. As flood reports surge across the county, local officials activate the county EOC to coordinate resource requests from on-scene ICs and track available local response assets.
3. When all three adjacent counties report resource shortages (e.g., limited high-water rescue trucks, insufficient sandbags), the state activates a MAC Group made up of emergency management directors from each affected county, state transportation officials, and FEMA representatives.
4. Each county EOC submits resource requests to the MAC Group, which prioritizes requests based on life safety risk, allocates state-level shared resources, and shares cross-regional policy guidance (e.g., a regional non-essential travel ban to keep roads clear for responders).
5. County EOCs pass the MAC Group guidance and allocated resources to local dispatch teams, which update responder routes and inform incoming callers of travel restrictions.

At no point does the MAC Group take over the work of the EOC or dispatch teams.

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Common MAC Group Misconceptions Debunked#

1. Misconception: MAC Groups run on-scene incident response. Fact: MAC Groups have no tactical authority, and only provide policy guidance and resource coordination for cross-jurisdictional events.
2. Misconception: When a MAC Group is activated, local EOCs and dispatch are no longer needed. Fact: EOCs and dispatch become the primary implementation arms for MAC Group guidance during large events, and their workload typically increases during MAC Group activation.
3. Misconception: All emergency responses involve a MAC Group. Fact: MAC Groups are only activated for multi-jurisdictional or large-scale complex events. The vast majority of routine local emergency calls and small incidents never involve a MAC Group at all.
4. Misconception: Activating a MAC Group means the situation is out of control. Fact: MAC Group activation is a planned, strategic coordination measure—not a sign of failure. It indicates that multiple jurisdictions or agencies need a formal mechanism to prioritize shared resources and align policy guidance.

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Final Takeaways#

MAC Groups, EOCs, and dispatch organizations are all critical, complementary parts of the emergency response ecosystem, and none can replace the others. Understanding their distinct roles helps:

• Emergency response teams align on chain of command during crises
• Community members know who to contact for different needs (call dispatch for immediate emergencies, reach out to your local EOC for general incident updates)
• Jurisdictions design more effective response plans for both small local events and large regional disasters

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References#

1. Federal Emergency Management Agency (FEMA). (2017). Multiagency Coordination Group Definition and Composition, IS-700B. Retrieved from https://emilms.fema.gov/_is0700b/groups/90.html
2. Federal Emergency Management Agency (FEMA). (2023). IS-100.c: Introduction to Incident Command System Training Materials. Retrieved from https://training.fema.gov/is/courseoverview.aspx?code=IS-100.c
3. Federal Emergency Management Agency (FEMA). (2017). National Incident Management System, Third Edition. Retrieved from https://training.fema.gov/emiweb/is/is700b/handouts/national_incident_management%20system_third%20edition_october_2017.pdf