Tallgrass Executive and Leadership Team

August, 2026

Leadership Overview

Tallgrass has 7 executives leading key functions including strategy, financial oversight, capital development, and operational management.

Focused on delivering reliable energy infrastructure, Tallgrass maintains a commitment to operational excellence and sustainable growth across the North American midstream sector through strategic asset development.

Leadership Roles at Tallgrass

  • Chief Executive Officer - Crystal Heter
  • President & Chief Executive Officer - Matt Sheehy
  • President & Chief Executive Officer, Amp - David Dehaemers
  • Executive Vice President & Chief Financial Officer - Gary Watkins
  • President, Segment Liquids (Crude Oil & Co2) - Kyle Quackenbush
  • Senior Vice President, Capital Project Development and Chief of Staff - Brooke Vandygriff
  • Executive Vice President & Chief People Officer - Joey Mahmoud
  • Crystal Heter - Chief Executive Officer

    Crystal Heter, the Chief Executive Officer at Tallgrass, directs the overarching corporate strategy and long-term vision for the organization. Overseeing the acquisition and development of midstream energy assets, the Chief Executive Officer ensures alignment with North American market demands. This leadership role involves constant evaluation of infrastructure projects to maximize efficiency and shareholder value. By fostering collaboration across all departments, Crystal Heter drives the company toward operational excellence. The Chief Executive Officer maintains rigorous standards for safety and environmental compliance while navigating complex regulatory landscapes. Through proactive engagement with stakeholders, the Chief Executive Officer secures the necessary capital for future expansion. Heter prioritizes the integration of innovative technologies to optimize pipeline performance and reliability. Ultimately, the Chief Executive Officer positions the firm as a leader in the energy services sector by maintaining a disciplined approach to asset management and strategic growth initiatives.
    Crystal Heter

    Matt Sheehy - President & Chief Executive Officer

    Matt Sheehy, the President & Chief Executive Officer at Tallgrass, manages the daily execution of business operations and strategic initiatives. Focusing on the expansion of midstream energy assets, the President & Chief Executive Officer coordinates cross-functional teams to achieve operational milestones. This role requires deep engagement with market trends to identify new opportunities for asset development across North America. By streamlining internal processes, Matt Sheehy enhances the overall productivity of the organization. The President & Chief Executive Officer collaborates with the board to refine corporate objectives and ensure financial stability. Sheehy oversees the implementation of large-scale infrastructure projects, ensuring adherence to project timelines and budget constraints. Through effective leadership, the President & Chief Executive Officer fosters a culture of accountability and performance. This executive role remains central to maintaining the competitive edge of the company in a rapidly evolving energy landscape while driving consistent value for all stakeholders.

    David Dehaemers - President & Chief Executive Officer, Amp

    David Dehaemers, the President & Chief Executive Officer, Amp at Tallgrass, leads the specialized division focused on advanced midstream projects and strategic partnerships. Overseeing the development of complex energy infrastructure, the President & Chief Executive Officer, Amp ensures that all initiatives align with the broader corporate mission of asset optimization. This role involves managing high-stakes negotiations and fostering relationships with key industry partners across North America. By leveraging technical expertise, David Dehaemers drives the successful execution of capital-intensive projects. The President & Chief Executive Officer, Amp monitors market shifts to adapt project scopes and maintain operational relevance. Dehaemers coordinates with other executive leaders to ensure seamless integration of new assets into the existing portfolio. Through strategic foresight, the President & Chief Executive Officer, Amp mitigates operational risks and enhances the long-term viability of energy infrastructure. This leadership position remains vital for sustaining growth and innovation within the competitive midstream energy sector.

    Gary Watkins - Executive Vice President & Chief Financial Officer

    Gary Watkins, the Executive Vice President & Chief Financial Officer at Tallgrass, manages the financial health and capital structure of the organization. Overseeing fiscal planning, treasury operations, and investor relations, the Executive Vice President & Chief Financial Officer ensures the company maintains a robust balance sheet to support ongoing asset development. This role involves rigorous analysis of market conditions to optimize capital allocation across North American operations. By implementing disciplined financial controls, Gary Watkins drives efficiency and transparency throughout the firm. The Executive Vice President & Chief Financial Officer collaborates with the leadership team to evaluate the economic feasibility of new infrastructure projects. Watkins monitors cash flow and debt management to ensure long-term sustainability. Through strategic financial reporting, the Executive Vice President & Chief Financial Officer provides the board with actionable insights for decision-making. This executive role remains essential for maintaining investor confidence and supporting the overall growth trajectory of the company.

    Kyle Quackenbush - President, Segment Liquids (Crude Oil & Co2)

    Kyle Quackenbush, the President, Segment Liquids (Crude Oil & Co2) at Tallgrass, manages the operational performance and strategic growth of the liquids and carbon capture business units. Overseeing the transportation and storage of crude oil and CO2, the President, Segment Liquids (Crude Oil & Co2) ensures the reliability and safety of critical midstream infrastructure. This role involves optimizing pipeline throughput and expanding market reach across North America. By analyzing commodity trends, Kyle Quackenbush drives the development of new service offerings to meet evolving energy needs. The President, Segment Liquids (Crude Oil & Co2) collaborates with engineering teams to maintain asset integrity and operational efficiency. Quackenbush monitors regulatory compliance and environmental standards to ensure sustainable operations. Through effective management of these specialized segments, the President, Segment Liquids (Crude Oil & Co2) contributes significantly to the overall revenue and strategic objectives of the company. This leadership position remains essential for maintaining a competitive presence in the liquids and carbon management sectors.
    Kyle Quackenbush

    Brooke Vandygriff - Senior Vice President, Capital Project Development and Chief of Staff

    Brooke Vandygriff, the Senior Vice President, Capital Project Development and Chief of Staff at Tallgrass, directs the planning and execution of major infrastructure projects while managing executive office operations. Overseeing the lifecycle of capital developments, the Senior Vice President, Capital Project Development and Chief of Staff ensures that all projects meet strict engineering and safety standards. This role involves coordinating cross-departmental efforts to streamline project delivery across North American markets. By facilitating communication between the executive team and operational units, Brooke Vandygriff enhances organizational alignment. The Senior Vice President, Capital Project Development and Chief of Staff monitors project milestones to ensure adherence to schedules and budgets. Vandygriff drives the implementation of strategic initiatives that support the company's core mission. Through meticulous project oversight, the Senior Vice President, Capital Project Development and Chief of Staff mitigates risks and optimizes resource utilization. This leadership role remains critical for maintaining the operational integrity and growth of the firm.

    Joey Mahmoud - Executive Vice President & Chief People Officer

    Joey Mahmoud, the Executive Vice President & Chief People Officer at Tallgrass, directs the human capital strategy and organizational development initiatives. Overseeing talent acquisition, employee engagement, and corporate culture, the Executive Vice President & Chief People Officer ensures the workforce remains aligned with the company's mission of operational excellence. This role involves designing programs that foster professional growth and retention across all North American operations. By implementing performance management systems, Joey Mahmoud drives accountability and high-performance standards throughout the organization. The Executive Vice President & Chief People Officer collaborates with other leaders to ensure that human resources strategies support the broader business objectives. Mahmoud monitors workplace safety and diversity initiatives to maintain a productive and inclusive environment. Through strategic workforce planning, the Executive Vice President & Chief People Officer secures the talent necessary to execute complex energy projects. This leadership role remains vital for sustaining the organizational health and long-term success of the firm.

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    Frequently Asked Questions Regarding Tallgrass Top Executives and Leadership Team

    Who leads Tallgrass?
    Tallgrass is led by Crystal Heter (Chief Executive Officer), along with executives such as Matt Sheehy (President & Chief Executive Officer) and David Dehaemers (President & Chief Executive Officer, Amp).
    Who is part of Tallgrass’s executive team?
    The executive team of Tallgrass includes leaders such as Crystal Heter (Chief Executive Officer), Matt Sheehy (President & Chief Executive Officer), David Dehaemers (President & Chief Executive Officer, Amp) and other senior executives.
    How many executives does Tallgrass have?
    Tallgrass has 7 executives leading key business areas.
    What roles are included in Tallgrass’s leadership team?
    The leadership team of Tallgrass includes roles such as Chief Executive Officer, President & Chief Executive Officer, President & Chief Executive Officer, Amp, Executive Vice President & Chief Financial Officer, President, Segment Liquids (Crude Oil & Co2).