There are always worries moving into a new season.

If a team is unsettled at quarterback, it is prescient to predict that problems are lurking around the corner. Next on the checklist, more often than not, is determining the ability and dependability of the starting left tackle.

The Giants can rest easy here. Their best player is their left tackle. This is a comfort to the team because it is a premium position and blind-side protectors are hard to find. This is also a bit of a conundrum as the offensive line is the No. 1 concern, the unit that stirs up the most question marks, other than the one exclamation point named Andrew Thomas.

As he enters his fourth NFL season, Thomas owns stronger job security than any player on the Giants’ roster. His five-year, $117.5 million extension has him under contract through the 2029 season, longer than any of his teammates. Defensive lineman Dexter Lawrence’s four-year, $90 million deal expires after the 2027 season. Daniel Jones struck gold with a four-year, $160 million package that runs through 2026. The rookie draft class is on the financial books through the 2026 season.

Thomas is already an established veteran and yet he is only 24 years old. If his body holds up, he could be looking for a new contract at age 30, which is hardly ancient, as offensive linemen can stay around — and play at a high level — for more than a decade.

Thomas went 36-7 in his three years at Georgia and won a national championship in 2017 as the starting right tackle as a true freshman. The Giants were 10-23 in Thomas’ first two seasons before he finally tasted NFL success with last year’s 9-7-1 record that produced the first playoff appearance and victory for the franchise since 2011.

“I think every year is a new year,’’ Thomas told The Post. “Last year, we built a good foundation, the coaching staff and the players we have here. We added some weapons, some players on defense as well. We’re trying to build on, obviously last year is over, we’re trying to have that same mentality, to fight for four quarters, protect the quarterback, run the ball and be a dominant offensive line.’’

There are only so many metrics available to rank offensive linemen. Thomas is the NFL’s No. 4 left tackle, according to Pro Football Focus. An ESPN poll of league executives, coaches and scouts has Thomas at No. 7. Pro Football Network puts Thomas at No. 4.

This Giants regime — general manager Joe Schoen and head coach Brian Daboll — inherited Thomas, the No. 4 overall pick in the 2020 draft, evaluated as the top tackle in that class by former general manager Dave Gettleman. Thomas struggled for much of his rookie season. He missed four games in 2021 with an ankle injury. His development and improvement was steady, though, and in 2023 he provided Jones with lockdown security.

Thomas then got paid. His $67 million in guaranteed money at signing is the most ever for an offensive lineman. His teammates saluted the money and the player that cashed in.

“The O-line is very tight and we’re all brothers and obviously we want each other to have the most success in the world,’’ Shane Lemieux, a backup interior lineman, said. “Especially Andrew, we’re in the same draft class. Seeing what he went through, how he overcame everything, it’s really inspiring. He blocked out all the noise and really succeeded out here. Nobody really understands what he went through and I’m really happy for him, proud of him.

“He’s very humble. You would never know who he was if you just met him on the street because he’s such a humble guy.’’

It would be fitting if Thomas carried a briefcase around with him at the facility. He gives off a young-executive vibe with the way he attends to his business, studies his craft, fills his media obligations and grows into a leadership role, entering his second year as a team captain.

The Giants hope Evan Neal, taken with the No. 7 pick in 2022, follows Thomas’ lead as far as replacing first-year struggles with second-year advancement. A rookie, John Michael Schmitz, will start at center and the two starting guards will come from a group consisting of Mike Glowinski (the likely starting right guard), Ben Bredeson and Josh Ezeudu.

“I think we have a very talented room,’’ Thomas said. “This is the closest competition I’ve seen in a long time for certain spots. That brings a good room. We have some guys with flexibility so if someone goes down they can play other spots. That helps because it’s a long season, injuries happen. You try to avoid ’em, but they do happen and to have a guy you can plug in and there will not be a drop off, that’s a great thing to have.’’

There is no plug-in for Thomas. He is one of one on the offensive line for the Giants.

“Our plan is to be explosive and score points and take care of the ball and build off of last year,’’ Thomas said.

Any plan the Giants have on offense begins with Thomas anchoring the left side of the line.