Doorkeeper (noun)

A person who is in charge of a door and controls access to a building or room.

Origin:

Late middle english dorekeeper, from dore (door) + keeper.

Examples:

1. The doorkeeper at the hotel would only allow guests with a room key to enter the building.
2. The doorkeeper checked the man's identification before allowing him to enter the secure area.
3. The doorkeeper at the nightclub was known for being strict and not letting in anyone without proper attire.
4. The doorkeeper at the concert was tasked with making sure everyone had a valid ticket.
5. The doorkeeper at the museum was responsible for ensuring the safety of the exhibits.