Someone who is qualified at wine is a sommelier and someone who is qualified at coffee is a barista.
What do you call the equivalent of someone for tea?
Also, I'm thinking there might be a word buried in someone's culture, like Asia maybe, but I have not yet found it and I've been looking for a while now.
I don't think the word would be brewer as that isn't really specific to tea because you can brew many things. Nor an infuser for the same reason.
Best Answer
Someone who specializes in tea is called simply a tea specialist.
If they are working in a restaurant, it is called a tea sommelier. This term would be equivalent to sommelier (or more specifically wine sommelier) and barista. For example, there are certificate programs to become a tea sommelier.
Note: Barista is someone who makes and serves coffee (usually espresso-based coffee drinks) but its meaning has expanded and they might be called a coffee sommelier also. Today, not all baristas are coffee experts but more of them are becoming experts. For example, Nespresso started this coffee sommelier program.
Apparently, sommelier is a versatile term that can be applied to many fields.