Primary Job Title President & CEO Primary Organization 
Marathon Petroleum
Location Findlay, Ohio, United States Regions Great Lakes, Midwestern US Gender Male
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Gary Hemingeris chairman of the board, president and chief executive officer of Marathon Petroleum Corporation. He is also chairman of the board and chief executive officer of MPLX GP LLC.
Gary is past-chairman of the board of trustees of Tiffin University. He serves on the boards of directors and executive committee of the American Petroleum
Institute (API) and American Fuel and Petrochemical Manufacturers Association (AFPM).
He also serves on the board of directors of Fifth Third Bancorp and JobsOhio, as well as on the U.S.-Saudi Arabian Business Council Executive Committee. Gary is a member of the Oxford Institute for Energy Studies.
Gary joined Marathon in 1975. His more than 40 years with Marathon include experience in a variety of groups and functions. In addition to five years in various financial and administrative roles, he spent three years in London, United Kingdom, as audit supervisor of the Brae Project. He worked with Emro Marketing for eight years in several marketing and commercial roles.
In 1991, Gary was named vice president of Emro Marketing's Western Division. Emro was the predecessor of Speedway SuperAmerica LLC. From 1995 to 1996 he served as president of Marathon Pipe Line Company. He assumed the position of manager, Business Development and Joint Interest of Marathon Oil Company** in November 1996.
Gary was named vice president of Business Development for Marathon Ashland Petroleum* upon its formation in January 1998 and was named senior vice president, Business Development in 1999.
In January 2001, he was named executive vice president, Supply, Transportation and Marketing. Gary was appointed president of Marathon Petroleum Company LLC**, a wholly owned subsidiary of Marathon, in September 2001.
In addition, he was named executive vice president - Downstream of Marathon Oil Corporation and served as a member of Marathon’s Executive Committee. He was named to his current position on July 1, 2011.
Gary earned a bachelor's degree in accounting from Tiffin University in 1976 while already employed by Marathon Oil Company in Findlay, Ohio. He earned a master's degree in business administration from the University of Dayton, Ohio, in 1982. He is a graduate of the Wharton School Advanced Management Program at the University of Pennsylvania.
