OXY CEO to Step Down

Occidental Petroleum (OXY) announced that Dr. Ray R. Irani has informed the Board of Directors of his desire to relinquish the position of Chief Executive Officer, effective at the May 2011 Annual Meeting of Stockholders, but to continue as full-time Executive Chairman. At a Board of Directors meeting on October 13, 2010, the Board decided, based on Dr. Irani's recommendation, that President and Chief Operating Officer Stephen I. Chazen will succeed Dr. Irani as Chief Executive Officer at the 2011 Annual Meeting and that at that time, Dr. Irani will transition to a new full-time role of Executive Chairman, to focus primarily on corporate strategy, Middle East operations and international business development. In addition, several Corporate functions will continue to report to him. Dr. Irani also informed the Board of his intention to retire at the end of 2014.

Dr. Irani said, "Steve is a proven leader who has been an integral member of the senior management team for many years, and I am confident that he will continue to make significant contributions to Occidental's ongoing success and development."

Aziz D. Syriani, Lead Independent Director of Occidental's Board, said on behalf of the Board of Directors, "Dr. Irani has been an outstanding CEO who has brought great vision to the Company, and the Board is extremely pleased that Occidental shareholders will continue to benefit from his strengths in his new role. Dr. Irani and Mr. Chazen have had a productive partnership for many years, and the Board believes that a continuation of this partnership is in the best interests of Occidental and its stockholders."

Mr. Chazen commented, "Dr. Irani has been an outstanding leader and mentor and I look forward to continuing to work with him to continue to build and deliver value for our stockholders."

Mr. Chazen has 30 years' experience in the oil and gas industry. He joined Occidental in 1994 as Executive Vice President – Corporate Development. He was named Chief Financial Officer in 1999, elected President and Chief Financial Officer in 2007, and became President and Chief Operating Officer in August 2010. He was also elected to the Board of Directors in 2010. Prior to joining Occidental, Mr. Chazen was a managing director in the investment banking group of Merrill Lynch & Co.

Dr. Irani joined the Company in 1983 as Chairman and Chief Executive Officer of Occidental Chemical Corporation. Under Dr. Irani's leadership, Occidental has led its proxy peer group in total stockholder return. Dr. Irani also has developed extensive personal relationships with government leaders throughout the Middle East and the rest of the world.