The SCU is made up of three distinct groupings or levels. Members can 'graduate' from one level to the next by going through riti battesimali (baptismal rites). The religious symbolism is probably left over from the SCU's association with the Camorra.

The lowest level, the Società Minore, is made up of lower-level criminals who do street-level activities. Members start out as picciotti and go through a 40-day trial to ensure they are suitable for criminal work and are not associated with the police. They are then inducted into the next phase of the level, the manovalanza, or worker. The candidate must also swear an oath of devotion to SCU.

The second level, the Società Maggiore, is made up of two positions. The Lo Sgarro position is given only to members who have killed at least three people for SCU, and from now on members cannot leave, on pain of death. Members can now form their own crew of picciotti, known as a filiale. Upon indoctrination into the La Santa position the member is given a firearm (to symbolically use on oneself upon failing SCU), a cyanide pill, cotton (representing Monte Bianco, which is considered sacred), a lemon (treating the wounds of one's comrades), a needle to puncture the index finger of the right hand, handkerchiefs (representing purity of spirit) and a spartenza (a gift of some sort, usually cigarettes).[2]

The final level is the Società Segreta, the core of the organization where key decisions are made.