LEXINGTON, Ky., Oct. 26 /PRNewswire-FirstCall/ -- Lexmark International, Inc. (NYSE: LXK ) announced that Paul J. Curlander, chairman and chief executive officer, plans to retire in the spring of 2011. As part of a planned management succession process, Curlander will assume the role of executive chairman, effective today. Curlander has led the company as CEO for the past 12 years. The Lexmark Board of Directors has appointed Paul Rooke as the company's president and chief executive officer, succeeding Curlander. The Board of Directors also elected Rooke as a director of the company. Curlander, 57, will continue as chairman of the Board of Directors. In his role as executive chairman, he will assist with the leadership transition, and Perceptive Software will continue to report to him.