Sounds like an enforcer... from what I understand what they generally did was get one or two guys on the payroll of a hotel/restaurant/etc. that was under their "protection".
In the book I've been reading on the mob, it explained that some mobsters are "fair" and make a deal to keep an affordable number of guys on the payroll of a business, and then would ensure that no other mobs/thieves messed with the place, keeping everybody happy. Others mobsters extort places for all they're worth... and are generally not very popular.
Robert Lino Jr. was an interesting crime boss from the 90's to ~2000's. He was generally considered both very secretive, but also very fair. He's not on wikipedia yet, but his older cousin Frank Lino is.
Anyway. We're really off-topic.