Here is the full list of all 15 Firefighters - there are Airport Heroes achievements.
Complete a mission in one of the water tankers Florian 4, Florian 5, or Florian 6
Complete a mission in one of the Panther trucks, Florian 9, Florian 10, or Florian 11.
Complete 5 missions.
Complete a large-scale mission.
Mark all the holes in the fence in one shift.
Complete a mission that turns out to be a false alarm.
Complete a mission using the pressure ventilator fans from Florian 3, Florian 4, Florian 5, or Florian 6 to cool down a plane’s landing gear.
Complete a mission with a fire in a plane’s cabin using the fire sprayer of Florian 9, Florian 10, or Florian 11.
Get promoted to Fireman.
Get promoted to Leading Fireman.
Get promoted to Chief Fireman.
Get promoted to Deputy Fire Chief.
Get promoted to Fire Chief.
Get promoted to Leading Fire Chief.
Get promoted to Senior Fire Chief.