The 43-year-old, twice a National League Cy Young Award winner and 10-time All-Star, had 305 career wins, the fourth most by a Major League left-hander.
He was released in June by the Braves who were not sure he had recovered from surgery on his shoulder and elbow in 2008.
Glavine will help Braves president John Schuerholz with various projects and work on TV and radio broadcasts, the Braves said on their website (http://atlanta.braves.mlb.com).
He made his Major League debut in 1987 and played 22 seasons with the Braves and New York Mets, compiling a 305-203 record.
