The departments were dispatched to a structure fire. Upon arrival, there was an old three story farmhouse that was converted into apartments. There was fire in the rear of the first floor with confirmed entrapment. Engine crews were making interior attack and conducting search & rescue. The two ladder companies were ordered to place ground ladders to the structure (for rescues). While operating on Side ‘A’ of the building, firefighters extended ladder to third floor roof. This roof had dormers. The firefighter was taking a roof ladder to place on the roof. He opened the hooks and proceeded to attempt to slide it up to the peak. Unable to make it from the ground ladder, he stepped onto the roof to attempt to place it again. He lost his balance and fell from the roof landing on the lawn. On the way down, be bounced off the ground ladder. He narrowly missed hitting hose teams operating. The firefighter had all the proper PPE in place, including SCBA. He was treated by the medic on scene and transported to the hospital. He was released later in the day with minor injuries. This event could have had tragic if not fatal consequences. He was operating on a very steep roof with little to no tactical advantages. He left the ground ladder, and therefore his only solid footing. It was early in the morning (0400) and dew from the evening was on the roof surface. This may have compounded the matters. He narrowly missed others on the ground when landing. People not involved directly in his actions were in danger as he fell. We sent a firefighter home that day in an injured state. He will be on limited duty and he and his family has been impacted in a negative way. This should never have happened. The department is doing a critique/lessons learned of the event with the hopes of uncovering the exact actions this firefighter was taking. We will learn that this was a preventable accident, a close call. It is all well and good for us to preach that fire departments need to be safe, but unless the message is clearly communicated to the firefighter, it is empty. Firefighters operate in dangerous conditions and fire departments have obligations to make this as safe as possible. However, if firefighters do not embrace the concepts, if they operate outside the command structure and free- lance, we will continue to hurt people. We all need to go home the same way we came into the firehouse. We all have families we need to go home to. Be safe!