The Los Angeles Rams’ Joe Barry gives instruction at training camp on July 29, 2017, in Irvine, Calif. (AP file photo)

Barry had porous defenses in previous stints as a coordinator in Detroit and Washington. He followed that up with a successful four-year stint as the Los Angeles Rams’ linebackers coach.

He believes the lessons from Detroit and Washington will help now.

“I’m really proud of my scars,” Barry said. “I really am. I think in life, you’re hardened in life by tough experiences. Now don’t get me wrong, I think you can learn a lot from having success and being in a good place. But I think when true growth takes place, I think it’s when things are really, really hard.”

Packers coach Matt LaFleur, who worked with Barry as a Rams assistant in 2017, said he interviewed nine candidates before making his selection.

The Los Angeles Rams' Joe Barry watches before a game against the Dallas Cowboys in Arlington, Texas, on Dec. 15, 2019. Green Bay Packers defensive coordinator Jon Barry understands the questions about his track record. Barry has been a defensive coordinator twice before with Detroit and Washington, and his defenses ranked near or at the bottom of the league in many statistical categories. He followed that up with a successful four-year stint as the Los Angeles Rams' linebackers coach. (AP file photo)

The Packers announced less than a week after their NFC championship game loss to the Tampa Bay Buccaneers that Mike Pettine wouldn’t return.

“I got a chance to work with Joe in L.A.,” LaFleur said. “I know what type of communicator (he is). I know the energy that he brings. And then I think he’s learned a lot from those previous experiences.”