Maryann Mannen is the Chief Executive Officer and President of Marathon Petroleum. Maryann has held the CEO seat since January 2026, and was previously Executive Vice President and CFO at TechnipFMC.
Current company
Marathon Petroleum
Marathon Petroleum is an American petroleum refining, marketing, and transportation company.
petroleum industryHeadquartered in FindlayFounded 2009NYSE: MPC
Source: WikidataMaryann Mannen joined Marathon Petroleum Corporation in January 2021 and has been CEO since January 2026. Before Marathon Petroleum, Maryann was Executive Vice President and CFO at TechnipFMC from January 2017 until January 2021.
Career
Sources: LinkedIn profile
60+ decision makers at Marathon Petroleum in Unify, vice president level and above. Choose a function to see who leads it.
Top decision makers at Marathon Petroleum
Vice president level and above, most senior firstMaryann Mannen leads a leadership team of 8 published executives. The most recent appointment is Maria A. Khoury as Executive Vice President and Chief Financial Officer, in seat since January 2026.
Most senior 5 of 8
| Name | Title | In seat since |
|---|---|---|
| Maryann Mannen (Maryann T. Mannen) | Chairman, President and Chief Executive Officer | January 2026 |
| Maria A. Khoury | Executive Vice President and Chief Financial Officer | January 2026 |
| Molly R. Benson | Chief Legal Officer and Corporate Secretary | January 2024 |
| Rick D. Hessling | Chief Commercial Officer | January 2024 |
| Gregory S. Floerke | Executive Vice President and Chief Operating Officer of MPLX GP LLC | February 2021 |
Sources: Marathon Petroleum 2025 Form 10-K
Maryann Mannen is the Chief Executive Officer and President of Marathon Petroleum. Maryann has held the CEO seat since January 2026, and was previously Executive Vice President and CFO at TechnipFMC.
Maryann Mannen has been CEO of Marathon Petroleum since January 2026, according to LinkedIn profile.
Maryann Mannen was Executive Vice President and CFO at TechnipFMC from January 2017 until January 2021, according to LinkedIn profile.
Maryann Mannen has been CEO of Marathon Petroleum for 8 months, since January 2026.
Maria A. Khoury (Executive Vice President and Chief Financial Officer), Molly R. Benson (Chief Legal Officer and Corporate Secretary), Rick D. Hessling (Chief Commercial Officer), Gregory S. Floerke (Executive Vice President and Chief Operating Officer of MPLX GP LLC), and 3 more. Source: Marathon Petroleum 2025 Form 10-K.
The seat holder is identified in Unify's professional profile dataset, then confirmed against the company's published leadership page, its SEC filings, and Wikipedia before publication. Career and education rows carry the public document they were taken from. Leadership team membership follows the company's own leadership page; in-seat dates come from filings where available and otherwise from the profile record. Company figures are read from the Unify headcount page for the same company and are profile coverage measures, never company-reported workforce totals. The employee preview lists vice president and senior vice president level profiles by department. No personal contact details are published.
