


Employees at Kosmos Energy Ltd. rank Andrew G. Inglis in the Top 25% of CEOs in Dallas. Comparatively, employees at Marathon Oil Corporation rank Lee Tillman in the Bottom 25% of CEOs in Houston. Employees rate their CEO differently based on the frequency of interaction, ability to affect company culture, and drive measurable results.

CEO of Kosmos Energy Ltd.
BIO: Andrew G. (Andy) Inglis joined Kosmos on March 1, 2014 as chief executive officer and chairman of the board of directors. With more than 30 years of experience, he is one of the most respected upstream executives in the oil and gas industry. Mr. Inglis came to Kosmos most recently from Petrofac where he was chief executive of the Integrated Energy Services business and a member of the board of directors. Prior to Petrofac, he spent 30 years with BP, most recently as CEO of its exploration and production business. He was an executive director on the BP board between 2007 and 2010. From 2004 to 2007, he was BP executive vice president and deputy chief executive of exploration and production, with responsibility for BP's growth areas, including Azerbaijan, Angola, Algeria, Gulf of Mexico, Egypt, Trinidad, and the Asia-Pacific region. He is a former non-executive director of BAE Systems plc and TNK-BP Ltd. Mr. Inglis holds a master’s degree in Engineering from Pembroke College, Cambridge University. He is a Chartered Mechanical Engineer, a Fellow of the Institution of Mechanical Engineers, and a Fellow of the Royal Academy of Engineering.

CEO of Marathon Oil Corporation
BIO: Mr. Lee M. Tillman has been the Chief Executive Officer, President and Director of Marathon Oil Corporation since August 1, 2013. Mr. Tillman served as a Vice President of Engineering at ExxonMobil Development Company, where he was responsible for all global engineering staff engaged in major project concept selection, front end design and engineering. He began his career in the oil and gas industry at Exxon in 1989 as a Research Engineer. He has extensive operations management and leadership experience that has included assignments in Jakarta, Indonesia; Aberdeen, Scotland; Stavanger, Norway; Malabo, Equatorial Guinea; Dallas and New Orleans. Mr. Tillman assumed the position of Operations Superintendant of New Orleans Production Organization in 1998 and was named Operations Manager of Mobil Equatorial Guinea relocating to Malabo, Equatorial Guinea in 2001. In 2003, he moved to Irving, Texas as Upstream Advisor to the ExxonMobil management committee. Relocating to Houston in 2005, he was appointed Offshore Division Manager of ExxonMobil Upstream Research Company. From 2006 to 2007, he served as Acting Vice President of ExxonMobil Upstream Research Company. From 2007 to 2010, he served as a North Sea Production Manager and Lead Country Manager at ExxonMobil Upstream Research in Stavanger, Norway. He is a Member of the Society of Petroleum Engineers. Mr. Tillman holds a Bachelor of Science degree in Chemical Engineering with honors from Texas A&M University and a Ph.D. in Chemical Engineering from Auburn University.

Women at Kosmos Energy Ltd. rated their CEO a C-

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At Kosmos Energy Ltd., employees in the HR department rate Andrew G. Inglis the highest. According to employees, Andrew G. Inglis' ability to drive business results is Very Bad.

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