In some departments, there are different organizational structures. A small company can have a lot of officers, and there's the large departments that have what seems to be an insufficient amount of officers due to the call volume and other stuff. How many officers does your firehouse / EMS company have (like chief-grade officers, lieutenants, safety officers, etc.)?
My department has 9 officers for 38 firefighters. 1 chief,1 deputy chief, 3 captains, 1 lieutenant, and 2 safety lieutenants. It all kinda works out good on any given fire we get at least 1 chief usually 2 captains and 10 or so firefighters, so it all kinda evens out.
In my department we have the Chief, Deputy Chief, Assistant Chief, Captain, 1st Lt., 2nd Lt. The Rescue Squad has a Assistant Chief of Rescue, Captain, 1st Lt., 2nd Lt. The Chief is in charge of the squad also. When the squad was first formed they were not part of the fire department till later.
With a roster of 60 (part time and volunteer) we have 1 chief, 3 bat. chiefs, 3 captains, and 6 lieut. 1 Bat Chief and 1 liet are out for god knows how long, 1 Bat Chief rarely shows up, 1 liet is Part Time so is only around while on duty, and one capt. is out of town for work a lot so we get at best 1 chief, 1 batt chief, 1 or 2 captains, and a lieut or two on a good working incident. I guess it is a good thing most of the firefighters can roll with it and get the job done.
my department currently has 7 fire line officers 2 engineers and 2 ambulance. they are Chief, Deputy Chief, Assistant Chief, Rescue Capt, Truck Captain, Engine Captain, and Marine Captain for fire line officers, then Chief Engineer and Assistant Enineer, then Ambulance Captain and Ambulance lieutant. We have 2 engines a tanker a brush truck a rescue pumper a 77 ft quint an ambulance a 22 ft twin engine Boston Whaler 12 ft aluminum john boat and a 6 ft inflatable zodiac. we handle approx 150 fire calls roughly 30 marine responses and approx 350 ambulance runs a year