Maryann T. Mannen is the Executive Vice President and Chief Financial Officer (CFO) at Marathon Petroleum Corporation, a leading, integrated downstream energy company in the United States. In her role, Mannen oversees the company's financial operations, including accounting, financial planning and analysis, investor relations, tax, and treasury functions. She plays a pivotal role in shaping Marathon Petroleum's strategic direction, ensuring financial stability and growth. Mannen joined Marathon Petroleum in 1988 and has held various leadership positions within the company. Her career trajectory reflects her deep understanding of the energy sector and her ability to drive financial performance. Prior to her current role as EVP and CFO, Mannen served as Senior Vice President and Controller, where she was instrumental in enhancing the company's financial reporting and internal controls. Her strategic vision and leadership have been crucial in navigating the complexities of the energy market and positioning Marathon Petroleum for long-term success. Throughout her tenure, Mannen has been recognized for her contributions to the industry. She has been a key figure in steering Marathon Petroleum through significant transformations, including the company's spin-off from Marathon Oil Corporation in 2011 and the acquisition of Andeavor in 2018. These milestones have solidified Marathon Petroleum's position as a major player in the refining and marketing sector. Mannen's expertise and dedication continue to drive the company's financial strategy, ensuring it remains competitive and resilient in a dynamic market environment.