Up here, a journeyman or master electrician holds a state license with that designation. It allows the holder to do electrical work without having to be supervised. A licensed journeyman or master electrician must do that electrical work for an electrical contractor (or other qualified employer), which is another state license. One qualification for a contractor's license is that the contractor must employ a licensed master electrician who works for no other contractor.
So a journeyman electrician must work for someone else, while a master electrician has the option of also getting a contractor's license and working for himself.