(CNN) - Former Republican National Committee Chairman Ed Gillespie will join the Mitt Romney campaign as a senior adviser, a source close to the campaign confirmed to CNN on Thursday.
Gillespie served as a top aide to then-House Majority Leader Dick Armey and as a counselor to President George W. Bush before taking the reigns at the RNC in 2003.
In 2010, Gillespie, who has founded strategic counseling and lobbying firms, was named the chairman of the Republican State Leadership Committee, which helps elect Republicans to local and state-wide positions.
Romney said Gillespie will bring a "wealth of experience that will prove invaluable in the political battle that lies ahead."
"He'll help in bringing Republicans and all Americans together behind my campaign and in communicating our message that America can do better than the chronic high unemployment, slow economic growth, and bitter political divisions that are Barack Obama's primary accomplishments," the former Massachusetts governor said in a statement.
News of Gillespie's new role was first reported by Politico.
- CNN Political Editor Paul Steinhauser contributed to this report.