The Nets have locked up general manager Sean Marks with a contract extension, multiple sources told The Post.

The Nets also are on the verge of agreeing to extensions for coach Kenny Atkinson and his staff. And playoffs or no, they already have seen enough out of Marks to want him to continue running the ship.

While Atkinson has become a dark horse for NBA Coach of the Year, Marks has drawn praise for taking over a team that was not only 21-61 prior to his first full season, but also bereft of its own picks, and managing to get them in position to make the playoffs in just three years.

Before the Nets’ 115-105 loss to the Raptors Wednesday at Barclays Center, Atkinson talked about the support he has gotten from Marks, and how much he wants to close the playoff deal to repay the patience from both the fans and front office.

“From Day 1 to right now … they have an understanding what this project is about and the necessary building blocks we’ve put in place, I think the patience of ownership has been outstanding,” Atkinson said. “Obviously me and Sean have a great relationship. And then the fans, that’s part of it too, to me. They’ve been beyond understanding.

“Even in that first year I was always shocked at how many people [said] ‘Hey, you’re moving in the right direction, you’re doing the right thing.’ Last year too, 28 wins and the support was always positive from the fans. So that’s huge. That gets you through the tough times. That’s why it’d be awesome to reward them with a playoff bid, quite honestly, to reward the franchise and the fans for their patience.”

Atkinson, emotional and an admitted curmudgeon, said Marks has kept him even-keeled throughout this arduous rebuilding process.

“Sean’s my stabilizer,” Atkinson said. “I’m a little more emotional and going with the ups and downs of the daily season. But he’s a guy I could vent to, he could counsel me.

“The great thing about Sean is he was a player, he’s been in management and he’s been a coach. He’s done scouting with San Antonio for the NBA Finals. He knows what the whole process is like. To have that sounding board, it kept me on an even keel.”

Jarrett Allen won the March NBA Cares Community Assist Award presented by Kaiser Permanente, recognizing his efforts to emphasize the importance of education and provide opportunities for Brooklyn youth. He provided STEM opportunities and resources for local kids.

“STEM education is something I’m really passionate about, so being able to share that passion with kids in the Brooklyn community was a blast,” said Allen, who met with students from 4-H last season to collaborate on “Incredible Wearables,” fitness monitors that track oncourt steps.