ἀμπελουργός

Luke 13:7 ἀμπελουργόν· vinedresser;

So he said to the keeper of the vineyard, ‘Look, for the past three years I have come to search for fruit on this fig tree and haven’t found any. Therefore cut it down! Why should it use up the soil?’

Here: Literally a 'vine-worker' (ampelos 'vine' + ergon 'work'). He tends, prunes and digs the vineyard for its owner. The word appears only here in the New Testament. In the next verse he speaks up for the tree.