Graham Packaging Executive and Leadership Team

June, 2026

Leadership Overview

Graham Packaging has 7 executives leading key functions including strategy, finance, technology, human resources, legal, and business unit operations.

Driven by innovation, Graham Packaging is dedicated to creating custom, value-added, and sustainable packaging solutions that meet the demands of modern consumers, working with some of the world's biggest brands to deliver safe, attractive, and convenient containers through innovative design and engineering.

Leadership Roles at Graham Packaging

  • President & Chief Executive Officer - Robert Pyle
  • Chief Financial Officer - Kristin Warfel
  • President HCI - Stephen Estok
  • President, Food and Beverage - Kevin Gilligan
  • Chief Technology Officer - Michael Milazzo
  • Chief Human Resources Officer - Lisa Santin
  • General Counsel - Douglas Cassel
  • Robert Pyle - President & Chief Executive Officer

    Robert Pyle, the President & Chief Executive Officer at Graham Packaging, directs the company's overarching strategy and operational execution. Pyle guides the organization's expansion across multiple product categories, including food and beverage, household products, personal care items, and automotive lubricants, ensuring alignment with the company's mission to provide custom, value-added, and sustainable packaging solutions. Overseeing global operations, the President & Chief Executive Officer drives market penetration by fostering strong relationships with Fortune 500 companies and independent businesses alike. This leadership role involves setting the vision for innovative design and engineering, crucial for delivering safe, attractive, and convenient containers. By championing a culture of continuous improvement, Robert Pyle ensures Graham Packaging maintains its position as a global leader in blow-molded plastic containers, directly impacting the company's financial performance and long-term market relevance.
    Robert Pyle

    Kristin Warfel - Chief Financial Officer

    Kristin Warfel, the Chief Financial Officer at Graham Packaging, manages all financial operations and strategic fiscal planning. Warfel oversees budgeting, forecasting, and financial reporting, ensuring the company's fiscal health and supporting its growth initiatives across diverse product sectors. Directing capital allocation, the Chief Financial Officer plays a critical part in funding research and development for innovative packaging solutions and expanding manufacturing capabilities. This executive role involves optimizing financial structures to support sustainable practices and value-added container development for major brands. By ensuring robust financial controls and driving efficiency, Kristin Warfel directly contributes to Graham Packaging's ability to serve both large corporations and smaller enterprises, solidifying the company's competitive edge in the blow-molded plastic container market.
    Kristin Warfel

    Stephen Estok - President HCI

    Stephen Estok, the President HCI at Graham Packaging, directs the strategic vision and operational performance for the Health, Care, and Industrial division. Estok oversees the development and execution of business plans aimed at expanding market share for specialized blow-molded plastic containers within these key sectors. Leading the HCI business unit, the President HCI ensures the delivery of custom, value-added, and sustainable packaging solutions tailored to the unique requirements of clients in healthcare, personal care, and industrial product markets. This leadership position involves fostering innovation in container design and manufacturing processes to meet stringent quality and safety standards. By driving operational excellence and strategic growth, Stephen Estok directly contributes to Graham Packaging's reputation for providing reliable and attractive packaging for critical applications.
    Stephen Estok

    Kevin Gilligan - President, Food and Beverage

    Kevin Gilligan, the President, Food and Beverage at Graham Packaging, leads the strategic direction and operational management for the company's significant presence in the food and beverage packaging sector. Gilligan oversees the development and delivery of innovative, customized blow-molded plastic containers designed to meet the rigorous demands of this dynamic industry. Directing all aspects of the food and beverage division, the President, Food and Beverage ensures the creation of safe, attractive, and convenient packaging solutions that enhance product appeal and shelf life. This executive role involves close collaboration with major food and beverage brands to drive sustainable packaging initiatives and meet evolving consumer preferences. By focusing on operational efficiency and market responsiveness, Kevin Gilligan directly contributes to Graham Packaging's leadership in providing high-quality packaging for a wide array of food and drink products.
    Kevin Gilligan

    Michael Milazzo - Chief Technology Officer

    Michael Milazzo, the Chief Technology Officer at Graham Packaging, spearheads technological innovation and infrastructure development. Milazzo directs the company's research and development efforts, focusing on advancing the design and engineering of customized blow-molded plastic containers. Overseeing the integration of cutting-edge technologies, the Chief Technology Officer ensures Graham Packaging remains at the forefront of creating sustainable and value-added packaging solutions for industries ranging from food and beverage to personal care. This critical role involves driving advancements in material science and manufacturing processes to meet evolving consumer demands and regulatory requirements. By fostering a culture of technological excellence, Michael Milazzo directly supports the creation of safer, more attractive, and convenient containers, reinforcing Graham Packaging's leadership position in the global market.
    Michael Milazzo

    Lisa Santin - Chief Human Resources Officer

    Lisa Santin, the Chief Human Resources Officer at Graham Packaging, leads all human capital strategies and organizational development initiatives. Santin oversees talent acquisition, employee engagement, and professional development programs designed to support the company's global workforce. Directing HR operations, the Chief Human Resources Officer ensures a robust talent pipeline capable of driving innovation in blow-molded plastic container design and manufacturing. This executive function is vital for cultivating a culture that supports the creation of custom, value-added, and sustainable packaging solutions for a diverse client base. By fostering a positive and productive work environment, Lisa Santin directly contributes to Graham Packaging's ability to meet the complex demands of serving Fortune 500 companies and smaller businesses, reinforcing the company's operational excellence.
    Lisa Santin

    Douglas Cassel - General Counsel

    Douglas Cassel, the General Counsel at Graham Packaging, provides comprehensive legal counsel and oversees all legal affairs for the organization. Cassel manages corporate governance, compliance, and risk mitigation strategies, ensuring adherence to all relevant regulations across the company's global operations. Directing the legal framework, the General Counsel supports the development and implementation of innovative packaging solutions, safeguarding intellectual property and contractual agreements. This role is essential for navigating the complexities of serving diverse industries, including food and beverage, household products, and personal care items, with customized and sustainable containers. By ensuring legal integrity and strategic counsel, Douglas Cassel directly contributes to Graham Packaging's ability to operate effectively and maintain trust with its extensive network of clients and stakeholders.

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    Frequently Asked Questions Regarding Graham Packaging Top Executives and Leadership Team

    Who leads Graham Packaging?
    Graham Packaging is led by Robert Pyle (President & Chief Executive Officer), along with executives such as Kristin Warfel (Chief Financial Officer) and Stephen Estok (President HCI).
    Who is part of Graham Packaging’s executive team?
    The executive team of Graham Packaging includes leaders such as Robert Pyle (President & Chief Executive Officer), Kristin Warfel (Chief Financial Officer), Stephen Estok (President HCI) and other senior executives.
    How many executives does Graham Packaging have?
    Graham Packaging has 7 executives leading key business areas.
    What roles are included in Graham Packaging’s leadership team?
    The leadership team of Graham Packaging includes roles such as President & Chief Executive Officer, Chief Financial Officer, President HCI, President, Food and Beverage, Chief Technology Officer.