Journeyman-4 years of OJT, and pass city test, or approved 4 year apprentice program.
Master Electrician - 8 years OJT, or PE, and pass city test.
Contractor's License - no requirements.
I could be wrong about some of these, but I think that you can get a basic idea about their requirements.
You must have a Master working ofr you, and the contractor's license.
The Watt Doctor