Thomas K. Sneed, Marathon Oil Vice President & CIO, to Retire Following 32 Years of Service

Thomas K. Sneed, Marathon Oil Vice President & CIO, to Retire Following 32
Years of Service

Bruce A. McCullough to Succeed Sneed Effective June 17

HOUSTON, June 5, 2013 (GLOBE NEWSWIRE) -- Thomas K. Sneed, vice president and
chief information officer (CIO) for Marathon Oil Corporation (NYSE: MRO), has
elected to retire effective Sept. 1, 2013 following more than 32 years of
service.

Bruce A. McCullough will succeed Sneed as vice president and CIO effective
June 17, 2013. McCullough joins Marathon Oil from Anadarko Petroleum Corp.
where he most recently served as director, Global Business Systems. In his
new position, McCullough will report to Janet F. Clark, Marathon Oil executive
vice president and CFO. Sneed will serve as vice president of IT Services
until Sept. 1 to facilitate an orderly transition to the department's new
leadership.

"Under Thom's able leadership, Marathon Oil's information management systems
have continued to evolve in the face of an extraordinarily dynamic information
technology environment that poses both substantial opportunities and
challenges to our Company," said Clarence P. Cazalot, Jr., chairman, president
and CEO of Marathon Oil. "We thank Thom for his many contributions during his
long and distinguished career and wish him good health and much happiness in
his retirement."

"We are pleased to welcome Bruce McCullough to Marathon Oil and we look
forward to benefitting from his deep technical skills and leadership
experience," said Clark. "It is essential that we have the capacity to
efficiently manage the vast amount of information necessary to make the
countless decisions we face each day. In addition, we must maintain a leading
edge perspective on the information tools so critical to the speed and quality
of our decision making. In this context, we look forward to the contributions
Bruce will make as we work to profitably grow our Company in a responsible
manner."

McCullough has worked in the information technology field, primarily in the
oil and gas sector, since graduating from Baylor University in 1988 with a
Bachelor of Arts degree in computer science. Prior to Anadarko, he was a
partner at Accenture and served in a variety of capacities for clients such as
Atlantic Richfield Company, Mitchell Energy and Development Corporation and
Burlington Resources.

While at Anadarko, he led efforts to develop and maintain systems and execute
strategic projects in both operations and corporate support functions. His
work was particularly focused on leveraging enterprise level business systems
and technologies, coupled with a substantial commitment to data analytics, to
add value from improved asset performance, capital efficiency and work process
efficiency.

CONTACT: Media Relations Contacts: 
         Paul Weeditz 713-296-3910
        
         Investor Relations Contacts:
         Howard Thill 713-296-4140
         Chris Phillips 713-296-3213
 
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