Rivera signed a new three-year, $19.5 million extension, NFL Media Insider Ian Rapoport reported, via a source informed of Rivera's situation. Rivera is now under contract through the 2018 season.
Rapoport added that Rivera's assistants got raises, too.
Joseph Person of the Charlotte Observer first reported the extension.
"It was an easy decision," Gettleman said. "Ron has worked extremely hard and we are thrilled with our current direction. Mr. Richardson has established a great culture here and Ron is a big part of that."
Although Rivera is among the NFL's highest-paid coaches, he's a relative bargain compared to NFC South rival Sean Payton, who recently signed a five-year extension worth more than $8 million annually.
Prior to the 2014 season, no NFC South outfit had ever won back-to-back division titles. Rivera's Panthers have now won the division crown for three consecutive years.
Whereas schisms divide front offices in other cities, Rivera works hand-in-glove with the shrewd Gettleman to turn under-the-radar free agents and afterthought rookies into key contributors.
Beyond his reputation as one of the game's premier defensive strategists, Rivera deserves credit for compiling a top-notch coaching staff, featuring defensive coordinator Sean McDermott, offensive coordinator Mike Shula and the offensive line tandem of John Matsko and Ray Brown.