A unit director is a person in charge of managing a specific team or unit within an organization. They oversee the work, coordinate tasks, and make sure everything runs smoothly within their assigned department. Full definition
Maybe give an editor, or a writer, or somebody like that a chance to be a second unit director, and then move up to director. (filmcomment.com)
By 1940, he had spent time as a film editor, second unit director, assistant director, and had become a seasoned professional in the business. (sensesofcinema.com)
Staub is a successful commercial director who served as 2nd unit director on such films as «300,» «Dawn of the Dead» and «The Thing.» (sfgate.com)