Noun
go-to guy (plural go-to guys)
(informal) A trusted or dependable person for a particular matter.
John, who has a PhD in Law, is the go-to guy in the office for legal questions.
Hypernym: go-to person
Yeah, I'm the go-to guy for Mexican priests. Cheech Marin
You know," Shane said twenty minutes later, "I'd feel a whole lot better about the two of us if you didn't think I was the go-to guy for breaking and entering. Rachel Caine
You have to be patient. I want to be the possession receiver, the go-to guy. When it's time for a big play, they can come to me. Ted Ginn, Jr.