MPLX合伙 MPLX

Ms. Mannen was appointed President and Chief Executive Officer, effective August 2024. She was elected Chairman of the Board, effective January 2026, having served as a member of the Board since February 2021. Ms. Mannen also was elected Chairman of MPC's Board of Directors, effective January 2026, having served as President and Chief Executive Officer of MPC, and as a member of MPC's Board of Directors, since August 2024. Previously, she served as President of MPC since January 2024, and as Executive Vice President and Chief Financial Officer from January 2021 through December 2023. Before joining MPC, Ms. Mannen was Executive Vice President and Chief Financial Officer of TechnipFMC (a successor to FMC Technologies, Inc.), a leading global engineering services and energy technology company, beginning in 2017, having previously served as Executive Vice President and Chief Financial Officer of FMC Technologies, Inc. since 2014, as Senior Vice President and Chief Financial Officer since 2011, and in various positions of increasing responsibility with FMC Technologies, Inc. since 1986. Ms. Mannen serves as chairman of the American Petroleum Institute (API), on the executive committee of American Fuel and Petrochemical Manufacturers (AFPM) and the executive committee of the Ohio Business Roundtable, and is a member of The Business Council. She also serves as secretary of the Cynthia Woods Mitchell Pavilion board of directors and is a member of its executive and finance committees. Ms. Mannen holds a bachelor's degree in accounting and a master's degree in business administration from Rider University. Other Public Company Directorships within Past Five Years: Marathon Petroleum Corporation (since 2024); Owens Corning (since 2014).

Mr. Floerke was appointed Executive Vice President and Chief Operating Officer, effective February 2021, having previously served as Executive Vice President and Chief Operating Officer, Gathering and Processing, Trucks and Rail, since August 2020. Prior to his 2020 appointment, he served as Executive Vice President Gathering and Processing beginning in 2018, as Executive Vice President and Chief Operating Officer, MarkWest Operations, beginning in 2017, and as Executive Vice President and Chief Commercial Officer, MarkWest Assets, beginning in December 2015 upon our acquisition of MarkWest Energy Partners, L.P. Before joining us, Mr. Floerke was Executive Vice President and Chief Commercial Officer at MarkWest beginning in 2015, and Senior Vice President, Northeast Region, at MarkWest beginning in 2013. Previously, he held senior management positions at Access Midstream Partners, L.P. from 2011 until 2013. Mr. Floerke is a member of the board of directors of TransTech Group, LLC.

Mr. Hagedorn was appointed Executive Vice President and Chief Financial Officer, and was elected a member of the Board, effective January 2024. He previously served as MPC's Senior Vice President and Controller since September 2021, and as MPLX's Vice President and Controller from October 2017 through August 2021. Before joining MPLX, he was Vice President and Controller at CONSOL Energy Inc., a Pennsylvania-based natural gas and coal producer and exporter, beginning in 2015, Assistant Controller beginning in 2014, and Director Financial Accounting beginning in 2012. Mr. Hagedorn was Chief Accounting Officer for CONE Midstream Partners LP, a publicly traded master limited partnership with gathering assets in the Appalachian Basin, from 2014 to 2015. Previously, he served in positions of increasing responsibility with PricewaterhouseCoopers LLP beginning in 1998. Mr. Hagedorn holds a bachelor's degree in accounting from West Virginia University.

Mr. Helms was elected a member of the Board, effective October 2012. Mr. Helms is President and Chief Executive Officer of US Shale Management Company, a wholly-owned subsidiary of US Shale Energy Advisors LLC. Mr. Helms is the co-founder of US Shale Energy Advisors LLC, a privately owned entity engaged in the development, ownership and operation of midstream energy assets. Through subsidiaries, it owns and operates Rocky Mountain Crude Oil LLC, a crude oil logistics company focused on the transportation of crude oil produced in the great plains and Rocky Mountain regions of the United States. From 2005 until his retirement in 2011, Mr. Helms served in various capacities with NiSource Inc. and its affiliate, NiSource Gas Transmission and Storage, including as Executive Vice President and Group Chief Executive Officer. He was Group President, Pipeline of NiSource Inc. from 2005 to 2008, where he was also a member of the Executive Council and the Corporate Risk Management Committee. He served as Chief Executive Officer and Executive Director of NiSource Gas Transmission and Storage from 2008 to 2011. At NiSource, Mr. Helms was responsible for leading the company's interstate gas transmission, storage and midstream businesses. Prior to joining NiSource, Mr. Helms held senior executive positions with CMS Energy Corporation, and subsidiaries of Duke Energy Corporation and PanEnergy Corp. from 1990 to 2005. Mr. Helms holds a bachelor's degree from Southern Illinois University at Edwardsville and a juris doctor degree from the Tulane University School of Law.

Ms. Breves was elected a member of the Board, effective November 2022. From 2013 until her retirement in December 2022, Ms. Breves held a number of senior roles at United States Steel Corporation (U.S. Steel), including a transitional role as Executive Vice President, Business Transformation from August 2022 until her retirement, as Senior Vice President and Chief Financial Officer beginning in 2019, as Senior Vice President, Manufacturing Support and Chief Supply Chain Officer beginning in 2017, and as Vice President and Chief Procurement Officer beginning in 2013. Prior to joining U.S. Steel, Ms. Breves was with Alcoa Corporation for 14 years, where she served in various leadership positions in the company's global procurement organization, including as Chief Procurement Officer from 2004 to 2012. Ms. Breves holds a bachelor's degree in management from College of Charleston and a master's degree in business administration and management from The Citadel. Other Public Company Directorships within Past Five Years: RXO, Inc. (since 2022); Sylvamo Corporation (since 2021).

Mr. Semple was elected our Vice Chairman and as a member of the Board in December 2015, upon our acquisition of MarkWest Energy Partners, L.P. He served as Vice Chairman until his retirement in 2016. He also served on MPC's Board of Directors from December 2015 until 2018. Prior to joining us, Mr. Semple served as President and Chief Executive Officer of MarkWest Energy Partners, L.P. beginning in 2003, and as Chairman of the Board beginning in 2008. Prior to his time at MarkWest, he served twenty-two years with The Williams Companies, Inc. and WilTel Communications, including as Chief Operating Officer of WilTel Communications, Senior Vice President/General Manager of Williams Natural Gas Company, Vice President of Operations and Engineering for Northwest Pipeline Company and division manager for Williams Pipe Line Company. Prior to joining Williams, Mr. Semple served in the United States Navy. He holds a bachelor's degree in mechanical engineering from the United States Naval Academy and has completed the Program for Management Development at Harvard Business School. Other Public Company Directorships within Past Five Years: Marathon Petroleum Corporation (since 2021).

On March 16, 2026, MPLX GP LLC, the general partner of MPLX LP, appointed Erin M. Brzezinski as Vice President and Controller of MPLX GP, effective April 1, 2026. Ms. Brzezinski, age 43, has served as the principal accounting officer and Vice President and Controller of MPC since January 2024. Prior to this appointment, she served as MPC's Assistant Controller, Technical Accounting, since August 2021, having previously served as Manager, Accounting, since 2019. Before joining MPC, Ms. Brzezinski was Director, Assurance and Audit Services, at PricewaterhouseCoopers LLP, a professional services and accounting firm, beginning in 2018, and Senior Manager beginning in 2013. She was Manager, Technical Accounting, at Cooper Tire & Rubber Company, an automotive tire manufacturer, from 2011 to 2013. Prior to that, Ms. Brzezinski served in positions of increasing responsibility with PricewaterhouseCoopers LLP beginning in 2004.

Mr. Lyon was appointed Senior Vice President Logistics and Storage, effective September 2022, having previously served as Vice President Operations and President Marathon Pipe Line LLC since 2018. Prior to his 2018 appointment, he served as Vice President of Operations for Marathon Pipe Line LLC beginning in 2011. Previously, Mr. Lyon served in various roles of increasing responsibility with MPC since 1989, including as Manager Marketing and Transportation Engineering beginning in 2010, and as District Manager Transport and Rail beginning in 2008. He served as board chair for Liquid Energy Pipeline Association in 2023 and chairs the board of the Louisiana Offshore Oil Port (LOOP).

Ms. Niese was appointed Vice President Treasury for MPC and us, effective January 2023. Prior to this appointment, she served as MPC's Assistant Treasurer beginning in February 2017, as Corporate Finance Manager beginning in October 2014, and as Brand Coordinating Manager beginning in 2011, having previously served in various analytical roles within Crude Supply, Terminals, Transportation and Rail and Internal Audit since joining MPC in 2003.

Mr. Partee was appointed Senior Vice President, effective October 2018. He was appointed MPC's Chief Business Transformation Officer, effective April 2025, having previously served as MPC's Chief Global Optimization Officer since January 2024. Prior to his 2024 appointment, he served as MPC's Senior Vice President Global Clean Products beginning in February 2021, as Senior Vice President Marketing beginning in October 2018, as Vice President Business Development beginning in February 2018, as Director Business Development beginning in 2017, as Manager Crude Oil Logistics beginning in 2014, and as Vice President Business Development and Franchise at Speedway beginning in 2012.

Mr. Heppner was appointed Senior Vice President, effective September 2022. He has served as MPC's Chief Strategy Officer and Senior Vice President Business Development since March 2024, having previously served as Senior Vice President Strategy and Business Development since February 2021. Prior to his 2021 appointment, he served as Vice President Commercial and Business Development beginning in 2018, as Senior Vice President of Engineering Services and Corporate Support of Speedway LLC beginning in 2014, and as Director Wholesale Marketing beginning in 2010.

Mr. Hessling was appointed Senior Vice President, effective October 2018. He was appointed MPC's Chief Commercial Officer, effective January 2024, having previously served as MPC's Senior Vice President Global Feedstocks since February 2021. Prior to his 2021 appointment, Mr. Hessling served as MPC's Senior Vice President Crude Oil Supply and Logistics beginning in 2018, as Manager Crude Oil & Natural Gas Supply and Trading beginning in 2014, and as Crude Oil Logistics & Analysis Manager beginning in 2011.

Ms. Kazarian was appointed Vice President Finance and Investor Relations for MPC and us, effective January 2023, having previously served as Vice President Investor Relations since 2018. Before joining us, she was Managing Director and head of the MLP, Midstream and Refining Equity Research teams at Credit Suisse, a global investment bank and financial services company, beginning in 2017. Previously, Ms. Kazarian was Managing Director of MLP, Midstream and Natural Gas Equity Research at Deutsche Bank, a global investment bank and financial services company, beginning in 2014, and an analyst specializing on various energy industry subsectors with Fidelity Management & Research Company, a privately held investment manager, beginning in 2005.

Mr. Henschen was appointed Senior Vice President, effective June 2025. He was appointed MPC's Executive Vice President Refining, effective June 2025, having previously served as MPC's Senior Vice President Refining since October 2024. Prior to his 2024 appointment, Mr. Henschen served as MPC's Vice President Refining beginning in 2020, as Director Refining, Reliability and Engineering beginning in 2017, as maintenance manager for the Detroit refinery and then the Galveston Bay refinery beginning in 2011, and as a refining planner beginning in 2004. He serves on the executive board of directors for the Louisiana Mid-Continent Oil and Gas Association (LMOGA).