Concierge means literally: a hotel employee whose job is to assist guests by booking tours, making theatre and restaurant reservations, etc. (especially in France) a resident caretaker of a block of flats or a small hotel.
Concierge Security, on the other hand, takes this further and adds additional remits such as secure checking in/out, maintaining visitor logs, using scanning and access systems, performing key holder duties, routine patrols and more.