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.