Marathon Petroleum Executive and Leadership Team

May, 2026

Leadership Overview

Marathon Petroleum has 8 executives leading key functions including strategy, finance, information technology, legal, and operations.

Driven by operational excellence, Marathon Petroleum is dedicated to powering the economy through its integrated downstream and midstream energy operations, maintaining the nation's largest refining system and extensive branded retail network.

Leadership Roles at Marathon Petroleum

  • Chairman, President & Chief Executive Officer - Maryann Mannen
  • Chief Financial Officer, LATAM - Antinea Reyes
  • President, Kl & Wl Investment Inc - Wally Lazar
  • President - Janet Dailey
  • Vice President & Chief Information Officer - Donald Wehrly
  • Chief of Staff & Technical Manager, Chair Asset Integrity Safety Systems Council - Theodore Andrus
  • Chief Legal Officer & Corporate Secretary - Molly Benson
  • Corporate Medical Director - Peter Fass
  • Maryann Mannen - Chairman, President & Chief Executive Officer

    Maryann Mannen, the Chairman, President & Chief Executive Officer at Marathon Petroleum, directs the company's overarching strategy and operational execution. Mannen guides the integrated downstream and midstream energy operations, leveraging the nation's largest refining system and extensive marketing network. This leadership role involves setting the strategic vision for Marathon Petroleum, ensuring alignment with market demands and shareholder value. Mannen oversees all major business segments, including refining, marketing, and the midstream operations managed through MPLX LP. The focus remains on driving efficiency, safety, and sustainable growth across the enterprise. By championing innovation and operational discipline, Maryann Mannen ensures Marathon Petroleum maintains its position as a leading energy provider, adapting to evolving industry landscapes and economic conditions.
    Maryann Mannen

    Antinea Reyes - Chief Financial Officer, LATAM

    Antinea Reyes, the Chief Financial Officer, LATAM at Marathon Petroleum, manages the financial operations and strategic fiscal planning for the company's Latin American activities. Reyes oversees all aspects of financial management, including budgeting, forecasting, and capital allocation within the region. This critical role ensures financial health and supports the expansion of Marathon Petroleum's market presence in LATAM. The Chief Financial Officer, LATAM works closely with regional leadership to identify growth opportunities and mitigate financial risks. By implementing robust financial controls and driving fiscal responsibility, Antinea Reyes contributes directly to the company's profitability and sustainable development in key international markets, ensuring compliance with local and international financial regulations.

    Wally Lazar - President, Kl & Wl Investment Inc

    Wally Lazar, the President, Kl & Wl Investment Inc at Marathon Petroleum, directs the investment strategies and operational oversight for Kl & Wl Investment Inc. Lazar focuses on maximizing returns and driving growth through strategic investments within the energy sector. This leadership position involves identifying new opportunities and managing existing portfolios to ensure financial performance and strategic alignment with broader company goals. The President, Kl & Wl Investment Inc plays a key part in capital deployment and resource allocation. Wally Lazar's expertise in investment management and operational efficiency is critical for enhancing the value and scope of the company's investment activities, contributing to Marathon Petroleum's overall financial strength.
    Wally Lazar

    Janet Dailey - President

    Janet Dailey, the President at Marathon Petroleum, holds a significant leadership position overseeing key operational segments of the company. Dailey drives strategic initiatives aimed at enhancing efficiency and profitability across Marathon Petroleum's extensive refining, marketing, and midstream businesses. This role involves close collaboration with other executives to ensure cohesive execution of corporate objectives and market strategies. The President focuses on optimizing performance within assigned business units, fostering innovation, and ensuring operational excellence. Janet Dailey's leadership contributes to Marathon Petroleum's ability to navigate market dynamics and maintain its position as a leader in the integrated energy sector, driving sustainable growth and value.

    Donald Wehrly - Vice President & Chief Information Officer

    Donald Wehrly, the Vice President & Chief Information Officer at Marathon Petroleum, directs the company's technology strategy and information systems infrastructure. Wehrly oversees the development and implementation of IT solutions that support Marathon Petroleum's extensive refining, marketing, and midstream operations. This leadership position is crucial for enhancing operational efficiency, cybersecurity, and data management across the enterprise. The Chief Information Officer ensures that technology investments align with business objectives, driving digital transformation initiatives. Donald Wehrly's responsibilities include managing the IT department, fostering innovation in technology adoption, and ensuring the reliability and security of all information systems, thereby supporting the company's competitive edge in the energy sector.
    Donald Wehrly

    Theodore Andrus - Chief of Staff & Technical Manager, Chair Asset Integrity Safety Systems Council

    Theodore Andrus, the Chief of Staff & Technical Manager, Chair Asset Integrity Safety Systems Council at Marathon Petroleum, provides strategic support and technical leadership for critical safety systems. Andrus manages key initiatives that enhance asset integrity and safety across Marathon Petroleum's vast operational footprint, including its refining and midstream infrastructure. This role involves coordinating efforts within the Asset Integrity Safety Systems Council, ensuring adherence to the highest safety standards. The Chief of Staff & Technical Manager, Chair Asset Integrity Safety Systems Council works to integrate technical expertise with strategic planning, driving improvements in safety protocols and system reliability. Theodore Andrus's contributions are vital for maintaining operational excellence and safeguarding company assets and personnel.
    Molly Benson, the Chief Legal Officer & Corporate Secretary at Marathon Petroleum, oversees all legal affairs and corporate governance functions for the company. Benson provides expert legal counsel on a wide range of matters, including regulatory compliance, litigation, contracts, and corporate transactions, supporting Marathon Petroleum's integrated downstream and midstream operations. As Corporate Secretary, Molly Benson manages board communications and ensures adherence to corporate governance best practices. This leadership role is essential for navigating the complex legal and regulatory landscape of the energy industry. The Chief Legal Officer & Corporate Secretary works to protect the company's interests and uphold its commitment to ethical business conduct, ensuring legal frameworks support strategic objectives.
    Molly Benson

    Peter Fass - Corporate Medical Director

    Peter Fass, the Corporate Medical Director at Marathon Petroleum, leads the company's health and wellness programs, ensuring the well-being of its workforce across all operational sites. Fass oversees the development and implementation of comprehensive medical policies and services, addressing the unique health challenges within the energy industry. This role is vital for maintaining a healthy and productive workforce, supporting Marathon Petroleum's commitment to employee safety and care. The Corporate Medical Director provides expert medical guidance, manages occupational health initiatives, and ensures compliance with health regulations. Peter Fass's leadership ensures that robust healthcare support is available, contributing to operational continuity and employee welfare.

    Frequently Asked Questions Regarding Marathon Petroleum Top Executives and Leadership Team

    Who leads Marathon Petroleum?
    Marathon Petroleum is led by Maryann Mannen (Chairman, President & Chief Executive Officer), along with executives such as Antinea Reyes (Chief Financial Officer, LATAM) and Wally Lazar (President, Kl & Wl Investment Inc).
    Who is part of Marathon Petroleum’s executive team?
    The executive team of Marathon Petroleum includes leaders such as Maryann Mannen (Chairman, President & Chief Executive Officer), Antinea Reyes (Chief Financial Officer, LATAM), Wally Lazar (President, Kl & Wl Investment Inc) and other senior executives.
    How many executives does Marathon Petroleum have?
    Marathon Petroleum has 8 executives leading key business areas.
    What roles are included in Marathon Petroleum’s leadership team?
    The leadership team of Marathon Petroleum includes roles such as Chairman, President & Chief Executive Officer, Chief Financial Officer, LATAM, President, Kl & Wl Investment Inc, President, Vice President & Chief Information Officer.