The point of a certified sommelier is not to be able to identify a particular wine in a blind tasting (that’s part of the testing process but not usually part of their day job), but rather to understand the nuances of a wide range of various wines in order to provide pairing advice to a diner or bar patron. They also may curate a restaurant’s wine list and maintain the cellar, as well as train the servers.
So if it were a thing, I suggest that a “pipe tobaccolier”

would be an expert piper familiar with the range of blends (perhaps every blend carried in a particular tobacco shop) who could be consulted by another pipe about their desired smoking experience (flavors, aromas, mouthfeel, burning performance, etc.) and recommend a blend that would fulfill their request to a T.
I’ll bet that some of us have met tobacconists or fellow pipers who possess this skill in a limited fashion, who are able to give an excellent recommendation for what to smoke at a particular time. Most of us are able to recommend blends that we’ve personally enjoyed, but our knowledge is usually limited to what’s in (or was, at one point) our own cellars, and not broad enough to be certifiable as experts.
(And yes, I just made up “pipe tobaccolier”

. If the exact term existed before, I am unaware and will chalk it up to a situation like Leibniz and Newton both independently inventing calculus.)