Ms. Hollub became President and Chief Executive Officer of Occidental Petroleum Corporation in April 2016. She has been a member of Occidental s Board of Directors since 2015. During her more than 40-year career with Occidental, Ms. Hollub has held a variety of management and technical positions with responsibilities on three continents, including roles in the United States, Russia, Venezuela and Ecuador. Before her appointment to President and Chief Executive Officer, she served as Occidental s President and Chief Operating Officer, overseeing the company s oil and gas, chemical and midstream operations. Ms. Hollub previously was Senior Executive Vice President, Occidental Petroleum, and President, Oxy Oil and Gas, where she was responsible for operations in the U.S., the Middle East region and Latin America. Prior to that, she held a variety of leadership positions, including Executive Vice President, Occidental, and President, Oxy Oil and Gas, Americas; Vice President, Occidental, and Executive Vice President, U.S. Operations, Oxy Oil and Gas; Executive Vice President, California Operations; and President and General Manager of the company s Permian Basin operations. Ms. Hollub started her career at Cities Service, which was acquired by Occidental. Ms. Hollub serves on the board of the American Petroleum Institute. She is a member of the Oil and Gas Climate Initiative and past chair of the World Economic Forum s Oil and Gas Community. A graduate of the University of Alabama, Ms. Hollub holds a Bachelor of Science in Mineral Engineering. She was inducted into the University of Alabama College of Engineering 2016 class of Distinguished Engineering Fellows and elected to the National Academy of Engineering Class of 2024.