Ensures filling start up and stop in a safe manner, follows the procedure and oversees parameters: connection and disconnection of the cylinders, the manipulation of all the valves needed to fill the cylinders or bundles with the right content, but also side tasks like analysis, batch numbering, stickers sticking, forms filling for traceability. Performs operations according to plan for the empty cylinders, the unloading of the trucks, the selection (sorting) of the cylinders, the control of the test date and the overall aspect of the cylinder, and the positioning in the empty buffer zone waiting for filling.