SAN JOSE, Calif. — Mike Macdonald graduated summa cum laude with a finance degree from the University of Georgia.

He earned a football master’s degree from The Harbaugh School, with nine seasons under John Harbaugh with the Ravens (two as defensive coordinator) and one as Jim’s coordinator at Michigan before becoming head coach of the Seahawks.

“I don’t think it’s possible to overstate [John’s] influence on me,” Macdonald said at Super Bowl LX Opening Night. “I love John Harbaugh. He was willing to take chances on me when other people weren’t, and invested in me and my career throughout. And stretched — the things I felt like I could do, he had a vision for.”

As the new head coach of the Giants, Harbaugh is bringing along a coaching internship program that started with Macdonald in 2013.

Talk about a well-timed poster boy.

“Just so proud. So impressed,” Harbaugh told The Post’s Steve Serby about Macdonald. “I’ve seen his whole journey, from the first day he graduated from college. He’s such a good dude, such a smart, hard-working good man.”

And yet pretty much anonymous up until now.

Two weeks ago, NFL Network conducted a man on the street poll of football-loving New Yorkers.

Could they identify a picture of Macdonald, whose suit-and-tie look would blend neatly into the accounting life that he spurned 13 years ago?

More people guessed Patriots quarterback Drake Maye — the person Macdonald’s top-ranked defense must contain in Super Bowl LX — than answered correctly.

Now Macdonald’s 38-year-old face is going to be all over the news for a week as he attempts to become the third-youngest coach to win the Super Bowl.

His mentor, John, already has a ring.

“All those principles that he’s about as a person resonated with me,” Macdonald said. “Those are a lot of the foundational principles we brought to Seattle.”

Macdonald’s path became possible when he reneged on a job acceptance at KPMG to become a coaching intern for the Ravens.

“With all due respect to KPMG, it was a pretty easy decision,” Macdonald said. “I was at that point in my career where I was like, ‘Is this thing for me? Is this where I’m supposed to go?’ It didn’t really feel right in the moment.”

Macdonald pulled double duty as a high school freshman football coach while studying at Georgia.

“When one of your players can do something one day that they couldn’t do the day before,” Macdonald said, “that will get you hooked right there.”

In an NFL that favors elevating offensive coordinators to head coach, Macdonald broke through early because of his defensive play-calling acumen and his pedigree.

“He set the tone from Day 1,” safety Coby Bryant said, “and we’re behind him.”

Macdonald hasn’t flinched at filling the big shoes of Hall of Fame-caliber predecessor Pete Carroll, following up a 10-win introductory season with an NFC title.

“We want … people to look at our team and say, ‘How the heck did they get that done up there?’ ” Macdonald said. “We have a vision about where we want to go. Really proud of where we’re at right now — and hopefully just the beginning.”