 In January 2005, he was named the Special Assistant to the General Manager of the Chicago Cubs, during which time he served as an advance scout for the team charting other major league teams and players as well as the Cubs' own minor league system.In December 2006, he was promoted to the position of assistant general manager of the Cubs.On August 19, 2011, Bush was named the interim General Manager of the Chicago Cubs replacing Jim Hendry.