At the same time Clear Channel has appointed Scott Wells, a board member at Clear Channel Outdoor, as chief executive of its Amercias division.
Eccleshare will focus on driving international growth. He will be based in London and continue to report to Pittman.
Eccleshare said: "After a record-breaking year in which we significantly outperformed the market, we have ambitious plans for CCI in 2015 and beyond as we deliver on our customer obsession.
"I'm hugely looking forward to continuing to drive our strategy for long-term profitable growth."
Wells will jointly report to Bob Pittman, the chairman and chief executive of both Clear Channel Outdoor Holdings and iHeartMedia, and Rich Bressler, the chief finance officer of Clear Channel and president, chief operating officer and chief finance officer of iHeartMedia.
The chief executive officer role is a new one for Clear Channel Americas. It replaces the president post that has been vacant since Suzanne Grimes’ departure in August last year.
Wells joins Clear Channel from asset management firm Bain Capital, where he was operating partner. He has sat on the board of directors for Clear Channel for six years.
Since August last year, Bain has also served as a member of Clear Channel Outdoor Americas’ Office of the President, which is responsible for setting the direction of the company.
Wells said: "The more I worked with the terrific team at Clear Channel Outdoor Americas, the more I realized that I wanted to play a more pivotal role in helping the company realize its great potential."