Producers can oversee a project, assigning and removing linguists from caption sets, as well as handing over caption sets to users; they cannot, however, translate a caption set. They can see all caption sets on a project.
To assign producers to a project, choose "Manage Producers" from the Project Drop Down Menu on the Project page:
You'll be able to add and remove producers from the project. Producers must be members of the team the project is part of, and they must have the role producer set. You may need to create producer users before you can proceed.