PM meaning in Jobs ?

In the cinema of the United States, a unit production manager (UPM) is the Directors Guild of America–approved title for the top below-the-line staff position, responsible for the administration of a feature film or television production. Non-DGA productions might call it the production manager or production supervisor. They work closely with the line producer. Sometimes the line producer is the UPM. A senior producer may assign a UPM more than one production at a time.