There are lots of words that could be used, and usually the specific role would indicate the name of the role used.
Some of the words could be:
Warden - A person responsible for the supervision of a particular place or activity or for enforcing the regulations associated with it.
‘the warden of a nature reserve’
‘an air-raid warden’
Marshal - An official responsible for supervising sports events, and for controlling crowds in other public events.
‘ground marshals joined the referee and touch judges in trying to regain order’
Groundskeeper - A person who maintains a sports ground, a park, or the grounds of a school or other institution; a groundsman.
Steward - An official appointed to supervise arrangements or keep order at a large public event, for example a race, match, or demonstration.
For more ideas you could perhaps look at the names of these jobs when they are advertised by tourist boards or civic authorities.