David N. Weidman is chairman and chief executive officer of Celanese Corporation, a $6.4 billion global integrated chemical company based in Dallas, Texas, U.S.A. He has served as president and chief executive officer since December 2004, and was appointed chairman by the Board of Directors in February 2007.

Prior to his current appointment, Weidman was vice chairman of the Celanese AG Board of Management from September 2003 and chief operating officer of Celanese AG since January 2002. Weidman joined Celanese AG in September 2000 as a member of the Board of Management and chief executive officer of the company’s chemicals business.

Before joining Celanese, Weidman was president of Allied Signal’s Performance Polymers business. His leadership at Allied Signal included appointments as president of Flourine Products and vice president and general manager of Performance Additives. He served as an officer of the company and as a member of the Corporate Executive Council.

Weidman began his career in the chemical industry in 1980 as a business development analyst for American Cyanamid Company in Wayne, N.J.  He held management responsibilities in strategic planning, business development, sales and marketing, acquisition integration and international management in businesses as diverse as specialty chemicals, pharmaceuticals, medical devices and agricultural chemicals. In 1990, he was appointed vice president and general manager of the company’s Fibers division.

Weidman is chairman of the Executive Committee of the American Chemistry Council’s board of directors and a board member of the International Council of Chemical Associations. He is immediate past chairman of the Society of Chemical Industry, America International Group. Weidman serves as a member of the board of directors of The Conservation Fund and serves on the National Advisory Council of the Marriott School of Management.