A stage manager is a person who directs the production and operation of a play, musical, or opera.
Stage managers frequently assist directors, choreographers, and designers.
They make sure that everything on stage is in the right place and operates properly, and that they are responsible for keeping the production on schedule.
Stage managers rehearse actors, musicians, and crew and are responsible for making sure all the performers are ready when needed.
They train or hire riggers, carpenters, electricians, and other technicians.
He is in charge of the rehearsal schedule and production budget.