The Saints Thursday named Payton's trusted second-in-command their interim coach, despite the fact that Vitt will miss a third of the season for his role in New Orleans' bounty system.
For his part, Payton received a season-long suspension - which begins Monday; Vitt, who takes over Monday, was handed a six-game suspension.
Saints general manager Mickey Loomis said in his announcement that the team will address at a later time how to divvy up Vitt's responsibilities during his six-week absence.
"It is important that we keep Sean Payton's philosophy front and center during this season," Loomis said. "Sean has been the driving force behind the tremendous success our team has enjoyed during the past six years, his leadership will be missed. But we need to set a course of action that gives us the best chance to win this season without our head coach.
"We considered a number of great options to handle Payton's duties both internally and externally, but believe this will provide the most seamless transition for our players and our coaching staff, allowing our offensive and defensive staffs to remain intact with the fewest changes," Loomis continued. "This is the same structure we used last season during Sean's knee injury."
Vitt, who carries the titles of assistant head coach and linebackers coach, briefly stepped in as acting head coach last season when Payton broke his leg. Vitt also was interim coach with St. Louis in 2005 before joining New Orleans as part of Payton's very first staff in 2006.
Vitt will be able to oversee the offseason training program and training camp before stepping aside for the first six weeks of the regular season.
The NFL played no role in the decision-making process.
"It's the Saints' decision," NFL spokesman Greg Aiello said, adding the team did not have to get approval from the league to make Vitt the interim coach.
"We are fortunate to have a great veteran coaching staff well equipped to handle this challenge," Loomis said. "Joe and Sean have worked closely together to build our program, one of the most successful in the NFL in the past six years, and I have the fullest confidence that Joe will continue that success that Sean has brought us."
- Kromer oversees the running game, will be entering his fifth season in New Orleans and like Carmichael has been mentioned as an up-and-coming head coaching candidate around the NFL.
The decision gives Saints players a measure of certainty and direction as the Monday opening of the offseason training program approaches.
The league's investigation found that Williams' bounty system offered off-the-books cash payments of $1,500 for "knockouts," in which an opposing player was knocked out of a game, or $1,000 for "cart-offs," in which an opponent needed help off the field. The league has said the bounty pool grew as large as $50,000.
The investigation also found that Payton initially lied about the existence of a bounty program and instructed his defensive assistants to do the same.
Loomis received an eight-game suspension for failing to ensure the program was stopped after the NFL first asked him to do so in early 2010.
The franchise, meanwhile, was fined $500,000 and docked second-round draft choices this year and next, although NFL Commissioner Roger Goodell has said he may lessen the 2013 penalty by modifying which pick the Saints lose if the club cooperates with the NFL's ongoing probe.
Williams, who was hired as defensive coordinator in St. Louis after last season, has been suspended indefinitely. His penalty will be up for review after next season.