Westlake Executive and Leadership Team

May, 2026

Leadership Overview

Westlake has 6 executives leading key functions including strategy, information technology, finance, and operations.

Driven by innovation, Westlake is dedicated to manufacturing and marketing performance and essential materials, alongside housing and infrastructure products, impacting global markets through its diverse product portfolio and commitment to sustainable solutions.

Leadership Roles at Westlake

  • President & Chief Executive Officer - Jean-Marc Gilson
  • Executive Vice President & Chief Financial Officer, Conocophillips - Jeffrey Sheets
  • Controller (Site and Country Chief Financial Officer) - Hung Pham
  • Axiall Family Association President - Earl Vital
  • President - Carl Sanders
  • Chief Information Officer - Mark Schmidt
  • Jean-Marc Gilson - President & Chief Executive Officer

    Jean-Marc Gilson, the President & Chief Executive Officer at Westlake, directs the overarching strategy and operational execution for the company's global manufacturing and marketing of performance and essential materials, and housing and infrastructure products. Gilson oversees the integration of the Performance and Essential Materials segment, which includes ethylene, polyethylene, styrene, and chlor-alkali products, with the Housing and Infrastructure Products segment, encompassing PVC sidings, windows, and pipes. This leadership role involves driving growth across diverse markets, including residential construction, packaging, automotive, and healthcare. By ensuring alignment between these core business units, Jean-Marc Gilson champions innovation and efficiency, directly impacting Westlake's market position and financial performance internationally. The President & Chief Executive Officer's vision guides the company's expansion and commitment to delivering essential materials and products worldwide.
    Jean-Marc Gilson

    Jeffrey Sheets - Executive Vice President & Chief Financial Officer, Conocophillips

    Jeffrey Sheets, the Executive Vice President & Chief Financial Officer, Conocophillips at Westlake, directs the company's comprehensive financial strategy and fiscal operations, managing capital allocation and investor relations. Sheets oversees the financial health of both the Performance and Essential Materials and Housing and Infrastructure Products segments, ensuring profitability and sustainable growth. This executive position involves rigorous financial planning, risk management, and the optimization of financial resources across Westlake's international operations. By providing strategic financial guidance, Jeffrey Sheets supports key business decisions, including mergers, acquisitions, and capital investments, crucial for expanding market reach in areas like construction and chemical processing. The Executive Vice President & Chief Financial Officer, Conocophillips's expertise is fundamental to Westlake's long-term economic stability and expansion.

    Hung Pham - Controller (Site and Country Chief Financial Officer)

    Hung Pham, the Controller (Site and Country Chief Financial Officer) at Westlake, manages the detailed financial reporting and site-specific fiscal oversight for the company's extensive operations. Pham ensures accurate accounting practices and compliance across various international locations, supporting the financial integrity of both the Performance and Essential Materials and Housing and Infrastructure Products segments. This role is crucial for maintaining granular financial control, monitoring operational expenditures, and contributing to regional financial strategies. By providing precise financial data and analysis, Hung Pham enables effective resource management and supports the strategic objectives of Westlake's global manufacturing footprint. The Controller (Site and Country Chief Financial Officer)'s diligence is essential for the company's consistent financial performance and regulatory adherence.

    Earl Vital - Axiall Family Association President

    Earl Vital, the Axiall Family Association President at Westlake, leads initiatives focused on the legacy and strategic alignment of the Axiall business unit within the broader company structure. Vital oversees the integration and operational continuity of former Axiall assets, particularly those related to the Performance and Essential Materials segment, ensuring their contribution to Westlake's overall product portfolio. This leadership position involves fostering strong relationships and driving specific strategic objectives tied to the historical strengths of the Axiall operations. By focusing on the unique contributions of this division, Earl Vital supports Westlake's market presence in key chemical and material sectors. The Axiall Family Association President's role is vital for maintaining operational synergy and maximizing the value derived from this integral part of Westlake's business.

    Carl Sanders - President

    Carl Sanders, the President at Westlake, directs significant operational divisions, focusing on the strategic execution and market performance of key business units. Sanders oversees critical aspects of both the Performance and Essential Materials and Housing and Infrastructure Products segments, ensuring alignment with the company's overarching goals. This executive role involves driving operational excellence, managing cross-functional teams, and implementing strategies to enhance product delivery and market penetration across Westlake's global footprint. By championing efficiency and innovation, Carl Sanders plays a key part in optimizing manufacturing processes and expanding the reach of Westlake's diverse product offerings. The President's leadership is instrumental in achieving the company's growth targets and maintaining its competitive standing in the materials and infrastructure sectors.

    Mark Schmidt - Chief Information Officer

    Mark Schmidt, the Chief Information Officer at Westlake, architects and executes the company's global information technology strategy, ensuring robust digital infrastructure to support manufacturing and marketing operations. Schmidt oversees the integration of advanced technologies across both the Performance and Essential Materials and Housing and Infrastructure Products segments, enhancing operational efficiency and data security. This critical role involves managing enterprise-wide IT systems, cybersecurity protocols, and digital transformation initiatives that underpin Westlake's diverse product lines, from ethylene and PVC to building materials. By driving technological innovation, Mark Schmidt ensures seamless data flow and system reliability, enabling informed decision-making and supporting the company's international presence. The Chief Information Officer's leadership is pivotal in maintaining Westlake's competitive edge through optimized digital capabilities.

    Frequently Asked Questions Regarding Westlake Top Executives and Leadership Team

    Who leads Westlake?
    Westlake is led by Jean-Marc Gilson (President & Chief Executive Officer), along with executives such as Jeffrey Sheets (Executive Vice President & Chief Financial Officer, Conocophillips) and Hung Pham (Controller (Site and Country Chief Financial Officer)).
    Who is part of Westlake’s executive team?
    The executive team of Westlake includes leaders such as Jean-Marc Gilson (President & Chief Executive Officer), Jeffrey Sheets (Executive Vice President & Chief Financial Officer, Conocophillips), Hung Pham (Controller (Site and Country Chief Financial Officer)) and other senior executives.
    How many executives does Westlake have?
    Westlake has 6 executives leading key business areas.
    What roles are included in Westlake’s leadership team?
    The leadership team of Westlake includes roles such as President & Chief Executive Officer, Executive Vice President & Chief Financial Officer, Conocophillips, Controller (Site and Country Chief Financial Officer), Axiall Family Association President, President.