St. Genesius is the patron saint of theatrical performers (also lawyers and epileptics - I'm sure there's a joke in there somewhere).
But that basically is just lumping us in with the actors. For something a little more specific to what we do:
St. Bernadette, patron of shepherds (since we shepherd/protect/guide the production and cast), or...
St. Brigid, patron of midwives (it may not be our baby, but we definitely help deliver it), or...
St. Juilan, patron of jugglers (sure, I can take blocking, be on book, run sound, set props, take tech notes and do tomorrow's schedule all at the same time... Coffee's out? Got it.), or...
St. Blaise, patron of town criers ("Hear ye, Hear ye, the play is about to begin - get thee to places!"), or, hopefully not too often...
St. Cajetan, the patron of the unemployed.