Skydiving wildland firefighters
Source (Wikipedia): Smokejumper

Smokejumpers are specially trained wildland firefighters who provide an initial attack response on remote wildfires. They are inserted at the site of the fire by parachute. This allows firefighters to access remote fires in their early stages without needing to hike long distances carrying equipment and supplies. Traditional terrestrial crews can use only what they can carry and often require hours and days to reach fire on foot. The benefits of smokejumping include the speed at which firefighters can reach a burn site, the broad range of fires a single crew can reach by aircraft, and the larger equipment payloads that can be delivered to a fire compared to pedestrian crews.