Of course! A bourbonian.
Well not just Bourbon, but there Society of Wine Educators who have a wine Sommelier program, also have a Certified Specialist of Spirits designation - http://www.societyofwineeducators.or...tification/css - and I have this.
I've heard of whisky sommeliers, but not specifically for bourbon.
I've heard people call bourbon experts a wide variety of names, most of which I won't repeat.
bibamus, moriendum est
I prefer Gentlemen of Discerning Taste.
The 19th century called it: A Judge of Good Whiskey.