I have been hearing that UPS has seperate employees who load the trucks then those who make the deliveries. I dont know how DHL does it but I know Fed Ex the drivers load their own trucks. Both Ground and Express. One Fed Ex Ground driver I heard about is Tim. He folds the shelves up in the back of the truck. And it looks as that he stands outside the back of his truck and tosses everything in while he loads his truck. Which to me its easier to sort everything out and place it on the shelves. Since these drivers cannot clock out until they are done making all of their Deliveries. Some UPS drivers are glad they dont load their own trucks and some wish they did load their own trucks. From what I hear most UPS loaders usually do not sort everything before loading it into the trucks. So sometimes the drivers have to make 2 trips to one stop. Fed Ex drivers usually load their own. Most of them sort the packages for each stop they make then place them in the truck so they only have to make 1 stop per location. Unless a package slides down the shelf and the driver over looks it. Which is known to happen.