Dr Ernesto Zedillo, 50, former president of Mexico, has been appointed to the board of directors of Alcoa. There are 10 directors currently on Alcoa's board of directors. In making the announcement, Alcoa Chairman and CEO Alain Belda said, ``Dr. Zedillo's broad experience in both government and private industry, with his knowledge of global markets and economies, will be an asset to Alcoa in helping Alcoa set its global growth agenda. Dr. Zedillo's remarkable work in transforming and reviving the economy in Mexico has given him a permanent place in the history of that country.''