Garry L. Peiffer

Retired President 

Director since 2012

Gary L. Peiffer

Mr. Peiffer is the retired president of MPLX GP LLC and retired executive vice president, Corporate Planning and Investor and Government Relations of Marathon Petroleum Corporation.

Mr. Peiffer began his career with Marathon in 1974 as an internal auditor. During his career, he held a variety of management positions with increasing responsibilities. These responsibilities included supervisor of employee savings and retirement plans, controller of Speedway Petroleum Corporation and numerous other marketing and logistics positions. In 1987, Mr. Peiffer was appointed to the President's Commission on Executive Exchange serving for a year in the Pentagon as special assistant to the Assistant Secretary of Defense for Production and Logistics. In 1988, he returned to Marathon Oil and was named vice president of Finance and Administration for Emro Marketing Company. He served as assistant controller, Refining, Marketing and Transportation beginning in 1992. Mr. Peiffer was named senior vice president of Finance and Commercial Services for Marathon Ashland Petroleum LLC¹ in 1998, executive vice president of Marathon Petroleum Corporation in 2011 and president of MPLX GP LLC in 2012 until his retirement in 2014.

Mr. Peiffer graduated with a bachelor’s degree in accounting from Bowling Green State University in 1974 and passed the certified public accountant exam in Ohio that same year.

Mr. Peiffer is a member of the board of directors of the Roppe Corporation. He is also a member of the Findlay-Hancock County Community Foundation’s Finance & Investment and Audit committees and serves on the boards of Blanchard Valley Port Authority and Catholic Community Foundation-Ohio.

 1 Name changed to Marathon Petroleum Company LLC, Sept. 1, 2005 and
Marathon Petroleum Company LP, Oct. 1, 2010