IPA: /ˈvɪnˌteɪdʒər/
KK: /ˈvɪnˌteɪdʒər/
A person who produces or harvests grapes for making wine.
The vintager carefully selected the best grapes for the wine.
Vintager → It is formed from "vintage" (from Old French *vintâge*, meaning the harvest of grapes or the year of production) and "-er" (meaning a person who). A vintager is a person involved in the harvesting or production of wine.
Think of someone who is involved in the 'harvest' of grapes ('vintage') — that's what a vintager does.