The term 'Mafia Chief' is a job title used to describe the leader of a Mafia organization. The two most common titles for this position are DON and CAPO. A DON is the highest ranking member of the Mafia and is responsible for making decisions, managing finances, and overseeing operations. A CAPO is a lower-ranking member of the Mafia who is responsible for carrying out orders from the DON. Both positions require a great deal of loyalty and discretion.