The sicilian mafia hierarchy is the same as the american cousins : made men,capo, boss over every province of Sicily has its own Commission. Clans are organized into districts (mandamenti) of three or four geographically adjacent clans. Each district elects a representative (capo mandamento) to sit on its Provincial Commission. The National Commission was a super partes organ born to sette the dispute and avoid wars.


In Campany there are a clan for many small towns or many clans in the big cities; the most important city is Naples. There are no organi for setlte disputes maybe the biggest clans sometime intervent for avoid wars that will ruin the bussiness;after Cutolo nobody tried to make a fusion of the clans in few biggest because nobody after cutolo had the charisma or the strenght for try it; for sure there are clans federato like the Secondigliano alliance but never more.
In the camorra you can start like a sentry or a pusher or even a killer as minor and maybe become boss at the age of 20 like is happening with the old boss was arrested and the young boy combat for the drugs traffick.
The camorra is the most violent and dont had even a making ceremony.

The ndrangheta is the most powerful and secret of the three.
The members are blood related and often marry a woman of the rival clan for stop the war.
The hierarchy is misterious and other roles are often indivuaded.
A non member is called contrasto onorato and is a parent for blood or wedding after made enter in minor society and if is a good member go in the Mayor society. Some ranks like the santista was created for made people that could be made normanly as politics, bussiness men,massoni and even cops).

If you speak English, when I'll had time I'll post the hierarchy charts.