game warden
From Longman Dictionary of Contemporary Englishgame wardenˈgame ˌwarden noun [countable] HBAsomeone whose job is to look after wild animals in a game reserveExamples from the Corpusgame warden• Shout for assistance, there is a game warden near to you.• The game warden and the biospherians were facing each other on either side of a thick airtight window.