Tallgrass Executive and Leadership Team

July, 2026

Leadership Overview

Tallgrass has 8 executives leading key functions including strategy, operations, finance, and human resources.

Driven by a commitment to operational excellence, Tallgrass focuses on acquiring, developing, and operating midstream energy assets across North America, shaping the energy infrastructure landscape.

Leadership Roles at Tallgrass

  • Chief Executive Officer - Crystal Heter
  • President & Chief Executive Officer, Amp - David Dehaemers
  • President & Chief Executive Officer - Matthew Sheehy
  • 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
  • Senior Vice President - Chief Information Officer - Brian Broyles
  • Executive Vice President & Chief People Officer - Joey Mahmoud
  • Crystal Heter - Chief Executive Officer

    Crystal Heter, the Chief Executive Officer at Tallgrass, directs the company's overall strategic vision and operational execution. Heter guides the acquisition, development, and operation of midstream energy assets, ensuring alignment with market demands and stakeholder objectives. This leadership role involves fostering innovation in asset management and driving sustainable growth across the North American energy sector. Overseeing all functional departments, Crystal Heter ensures that the company's infrastructure projects meet rigorous safety and environmental standards. The Chief Executive Officer's focus remains on maximizing asset value and expanding market reach, directly contributing to Tallgrass's position as a key player in the energy services industry. Heter's strategic direction underpins the company's commitment to reliable energy delivery.
    Crystal Heter

    David Dehaemers - President & Chief Executive Officer, Amp

    David Dehaemers, the President & Chief Executive Officer, Amp at Tallgrass, spearheads the strategic direction and operational oversight for the Amp segment. Dehaemers drives the development and management of critical midstream energy assets, focusing on crude oil and CO2 infrastructure. This executive leadership ensures efficient operations and expansion within the North American energy market. Overseeing all aspects of the Amp business unit, David Dehaemers cultivates strategic partnerships and identifies new growth opportunities. The President & Chief Executive Officer, Amp's mandate includes optimizing asset performance and ensuring compliance with industry regulations. Through astute financial management and operational planning, Dehaemers enhances the value proposition of Tallgrass's energy services portfolio. David Dehaemers's leadership is central to the segment's success.

    Matthew Sheehy - President & Chief Executive Officer

    Matthew Sheehy, the President & Chief Executive Officer at Tallgrass, commands the overarching strategic initiatives and operational frameworks for the organization. Sheehy directs the company's expansion and optimization of midstream energy assets, ensuring robust performance across North America. This executive position involves cultivating a culture of operational excellence and driving long-term value creation. Overseeing all major business segments, Matthew Sheehy collaborates with functional leaders to achieve ambitious growth targets and maintain industry leadership. The President & Chief Executive Officer's responsibilities encompass strategic capital allocation and fostering key stakeholder relationships. Through decisive leadership and a forward-thinking approach, Sheehy guides Tallgrass in navigating the dynamic energy landscape. Matthew Sheehy's vision is integral to the company's sustained success.

    Gary Watkins - Executive Vice President & Chief Financial Officer

    Gary Watkins, the Executive Vice President & Chief Financial Officer at Tallgrass, directs the company's financial strategy and fiscal operations. Watkins oversees all aspects of financial planning, capital allocation, and investment management for the acquisition, development, and operation of midstream energy assets. This critical role ensures the financial health and sustainable growth of the organization across North America. Managing the finance, accounting, and treasury departments, Gary Watkins provides strategic financial insights to support executive decision-making. The Executive Vice President & Chief Financial Officer's purview includes risk management and optimizing the company's capital structure. Through rigorous financial oversight and strategic guidance, Watkins enhances shareholder value and supports Tallgrass's operational objectives. Gary Watkins's financial acumen is fundamental to the company's stability.

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

    Kyle Quackenbush, the President, Segment Liquids (Crude Oil & Co2) at Tallgrass, directs the strategic operations and commercial activities for the company's crude oil and CO2 midstream assets. Quackenbush oversees the development, expansion, and efficient management of critical infrastructure, ensuring reliable transportation and services across North America. This leadership position is key to maximizing the value of the liquids segment. Managing all aspects of the crude oil and CO2 business units, Kyle Quackenbush fosters strong customer relationships and identifies new market opportunities. The President, Segment Liquids (Crude Oil & Co2)'s focus includes operational excellence, safety, and regulatory compliance. Through strategic leadership and a deep understanding of the energy market, Quackenbush drives segment profitability and growth. Kyle Quackenbush's expertise is central to Tallgrass's liquids operations.
    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, orchestrates the strategic planning and execution of major capital projects. Vandygriff oversees the development lifecycle of new midstream energy assets, ensuring projects align with company objectives and market opportunities across North America. This dual role also involves managing key strategic initiatives and providing direct support to executive leadership. Coordinating cross-functional teams, Brooke Vandygriff drives project efficiency and timely delivery, while the Chief of Staff function ensures seamless operational integration and strategic alignment. The Senior Vice President, Capital Project Development and Chief of Staff's focus is on maximizing project ROI and fostering innovation in asset development. Vandygriff's leadership is pivotal in expanding Tallgrass's infrastructure footprint. Brooke Vandygriff's contributions are essential to the company's growth.

    Brian Broyles - Senior Vice President - Chief Information Officer

    Brian Broyles, the Senior Vice President - Chief Information Officer at Tallgrass, leads the company's technology strategy and digital transformation initiatives. Broyles oversees the development and implementation of robust IT infrastructure, ensuring secure and efficient operations for the acquisition, development, and operation of midstream energy assets across North America. This executive role is crucial for enhancing operational capabilities and driving innovation. Managing the information technology department, Brian Broyles ensures that technology solutions support business objectives and improve data management. The Senior Vice President - Chief Information Officer's responsibilities include cybersecurity, system integration, and leveraging data analytics to optimize asset performance. Through strategic technology investments, Broyles strengthens Tallgrass's competitive position. Brian Broyles's expertise is vital for the company's technological advancement.

    Joey Mahmoud - Executive Vice President & Chief People Officer

    Joey Mahmoud, the Executive Vice President & Chief People Officer at Tallgrass, leads the company's human capital strategy and organizational development. Mahmoud oversees all aspects of talent management, employee relations, and culture initiatives, ensuring a high-performing workforce that supports the acquisition, development, and operation of midstream energy assets across North America. This role is fundamental to fostering a positive and productive work environment. Managing the human resources department, Joey Mahmoud develops programs to attract, retain, and develop top talent, aligning people strategies with business objectives. The Executive Vice President & Chief People Officer's responsibilities include compensation, benefits, and ensuring compliance with labor laws. Through strategic people leadership, Mahmoud cultivates an engaged workforce essential for Tallgrass's success. Joey Mahmoud's commitment to people is a cornerstone of the company's operations.

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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 David Dehaemers (President & Chief Executive Officer, Amp) and Matthew Sheehy (President & Chief Executive Officer).
    Who is part of Tallgrass’s executive team?
    The executive team of Tallgrass includes leaders such as Crystal Heter (Chief Executive Officer), David Dehaemers (President & Chief Executive Officer, Amp), Matthew Sheehy (President & Chief Executive Officer) and other senior executives.
    How many executives does Tallgrass have?
    Tallgrass has 8 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, Amp, President & Chief Executive Officer, Executive Vice President & Chief Financial Officer, President, Segment Liquids (Crude Oil & Co2).