Davis, a 12-year NFL veteran, will join Green Bay's front office as director of player development.
Davis took over as the Packers' long snapper in 1997 and played 167 games in a Green Bay uniform -- the third-longest streak in team history. Only Brett Favre (255) and Forrest Gregg (187) played in more consecutive games than Davis. He played the 1996 season with Chicago.
Favre, who played with Davis in the Packers' loss to Denver in the 1998 Super Bowl, announced his retirement earlier this month.
"We're looking forward to having Rob evolve into his new role within our organization," Packers general manager Ted Thompson said Wednesday. "He's been a tremendous contributor as a player, and I have no doubt that he will carry that commitment and enthusiasm to his position. He is someone who has always been respected as a leader and mentor in the locker room and we know that will continue."
Davis will likely be replaced by Thomas Gafford, who was signed Monday after spending last season out of the NFL. Gafford was with the Packers during training camp in 2006 and was waived by Seattle last June.