The Chargers defensive coordinator is expected to be named the next head coach of the Carolina Panthers. Rivera is currently in Charlotte for a second interview. He's the only person to speak with the team twice and the Panthers have not scheduled a follow-up interview with any other candidates.
Under Rivera, the 2010 Chargers led the NFL in total defense and passing defense and finished second in sacks. Rivera took over as Chargers defensive coordinator midway through the 2008 season, taking over when Ted Cottrell was fired. Rivera was also the Bears defensive coordinator from 2004-2006, helping Chicago reach the Super Bowl in his final season there.
If he gets the position, Rivera will be the fourth head coach in Carolina history. Interestingly, all of the previous three (Dom Capers, George Seifert and John Fox) were also defensive coordinators.
The Chargers do not currently have a coach on their staff who has been an NFL defensive coordinator, so Rivera's replacement would likely come from outside the organization.