There are many courses available to those who wish to learn about any aspect of working backstage in a theatre. www.theatredesign.org.uk/edu/courses.htm has a comprehensive list.
Training can also be on apprentice basis at many theatres, particularly in the larger institutions. Names and addresses can be found in:
Contacts: Stage, Theatre, Screen, Television Professionals
by Kate Poynton (Editor)
Publisher: The Spotlight, 2003
For a link to this book on Amazon.co.uk please click here to go to the first page of this story.