The command established in the early moments of a working fire can mean the difference between a coordinated, effective operation and a chaotic one. Whether you're a seasoned company officer or a newer lieutenant stepping into the role, understanding how to set up command at a working fire is a foundational skill, and it starts the moment you put on your helmet shield and take charge.
Why Command Matters from the First Minute
The incident command system (ICS) isn't just a bureaucratic requirement; it's a life-safety framework. At a working fire, everyone on the fire ground needs to know who's in charge, where command is located, and how information flows. A strong command presence keeps crews organized, resources accounted for, and tactical priorities clear.
Your helmet shield is more than a piece of personal protective equipment. It's a visual identifier that signals rank and role on the fire ground. When personnel arrive on scene, they look for that shield, whether it's a lieutenant's or chief's, to orient themselves and know where to report.

Step 1: Conduct a Scene Size-Up at the Working Fire
Before command can be formally established, the first-arriving officer must complete a rapid scene size-up at the working fire. This includes:
- Life safety – Are there visible victims? Are occupants unaccounted for?
- Fire conditions – What's the size, extent, and behavior of the fire?
- Building type and construction – Balloon frame, lightweight truss, or ordinary construction each carry different collapse risks.
- Access and egress – Where can crews enter and exit safely?
Transmit an on-scene report immediately over the radio. Be clear, concise, and factual. Announce the address, building description, fire conditions, and your initial actions.
Step 2: Establish and Announce Command
Command is established the moment the first-arriving officer announces it over the radio. A simple, direct transmission works: "Engine 1 is on scene of a two-story residential structure with fire showing from the second floor. Engine 1 is establishing [Street Name] Command."
From this point forward, that officer assumes all the responsibilities of Incident Commander (IC) in that specific working fire. If they go interior with their crew, they must pass command to an arriving chief officer as soon as one is available. A structural firefighting helmet with a clearly visible shield helps everyone on the fire ground immediately identify who holds the IC role. Visual cues play an important role when radio traffic is heavy and noise is high.
Step 3: Set Up the Command Post
The command post (CP) should be positioned in a safe area with a clear view of the structure. A good rule of thumb is to stay out of the collapse zone and away from apparatus traffic lanes. The IC should be stationary at the CP so that all incoming units know exactly where to report.
From the CP, the IC manages crew assignments and accountability by tracking every team on the working fire ground using a personnel accountability system (PAS). Building on that foundation of personnel visibility, resource allocation becomes the next critical function, like directing engines, ladders, and rescue units to their assignments as conditions evolve. Underpinning all of this is disciplined radio communication, as the IC must maintain clear, controlled traffic on the command channel to ensure information moves accurately and without delay. Together, these functions support the tracking of tactical benchmarks, allowing the IC to monitor key milestones such as primary search complete, water on the fire, and ventilation in progress.

Step 4: Build Out the Working Fire Command Structure
At a working fire, a single IC can quickly become overwhelmed. That's where expanding the ICS structure becomes essential. Consider assigning:
- Division or Group Supervisors to manage operations on each side of the building or functional task (e.g., Division A for the front, Division B for the rear).
- The Safety Officer monitors conditions, identifies hazards, and has the authority to stop operations if an imminent danger exists.
- A Staging Officer manages incoming resources so they don't self-deploy to the fire ground.
Each of these roles benefits from clearly identifiable equipment, from fire department helmet shields or safety vest markings, that make role assignments visible at a glance.
Step 5: Continuously Evaluate and Adapt
A working fire is a dynamic environment. Conditions change: fire progresses, crews report new information, and tactical priorities shift. The IC must continuously evaluate the strategy (offensive vs. defensive) and adjust accordingly.
When in doubt, prioritize firefighter safety. No structure is worth a life. If conditions deteriorate, don't hesitate to transition to a defensive attack and pull crews out.
Laying the Foundation for a Reliable Working Fire Command
Setting up command at a working fire is both an art and a science. It requires calm under pressure, clear communication, and disciplined use of ICS principles. From the moment the first officer puts on their helmet shield and announces command on the radio, the foundation is laid for a safe and effective operation.
Train for it. Drill it. Make it second nature. Remember: on the fire ground, there's no time to figure it out for the first time. Contact IMS Alliance® and learn more about the elements of an effective command at a working fire.
