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President and Chief Executive Officer of Occidental Petroleum Corporation (Occidental), an international oil and gas exploration and production company, since April 2016. Having served more than 30 years at Occidental, Ms. Hollub served as President and Chief Operating Officer from 2015 to 2016; Senior Executive Vice President, Occidental and President, Oxy Oil and Gas - Americas from 2014 to 2015; and Executive Vice President, Occidental and Executive Vice President, U.S. Operations and Oxy Oil and Gas from 2013 to 2014.