Grand River Dam Authority Executive and Leadership Team

May, 2026

Leadership Overview

Grand River Dam Authority has 8 executives leading key functions including strategy, finance, information technology, operations, human resources, and property administration.

Driven by a commitment to reliable energy, Grand River Dam Authority generates, transmits, and sells electricity, powering communities and industries across Oklahoma and beyond with a focus on sustainable and efficient power solutions.

Leadership Roles at Grand River Dam Authority

  • President & Chief Executive Officer - Daniel Sullivan
  • Chief Financial Officer - Henry Neftzer
  • Deputy Chief Financial Officer - Matthew Martin
  • Chief Operating Officer - Tim Brown
  • Chief Information Officer - Anthony Dionisio
  • Chief People Officer - Angela Long
  • Chief People Officer, Materials Control - Robert Wheeler
  • Superintendent Properties Administration Coordinator & Chief People Officer - Mary Edmundson
  • Daniel Sullivan - President & Chief Executive Officer

    Daniel Sullivan, the President & Chief Executive Officer at Grand River Dam Authority, directs the overall strategic vision and operational execution for the organization. Sullivan guides the company's mission to generate, transmit, and sell electricity, ensuring reliable power delivery to Oklahoma municipalities, electric cooperatives, and industrial customers. This leadership role involves fostering innovation in energy generation and distribution, managing key stakeholder relationships, and driving financial performance across a four-state region. By setting the corporate direction, Daniel Sullivan ensures alignment with regulatory requirements and market demands, solidifying the Grand River Dam Authority's position as a critical energy provider. Sullivan's oversight extends to all facets of the business, from resource management to long-term growth initiatives, impacting the economic vitality of the communities served.
    Daniel Sullivan

    Henry Neftzer - Chief Financial Officer

    Henry Neftzer, the Chief Financial Officer at Grand River Dam Authority, manages the organization's financial health and strategic fiscal planning. Neftzer oversees all financial operations, including budgeting, forecasting, accounting, and treasury functions, ensuring fiscal responsibility and compliance. This role is critical in supporting the company's mission to generate, transmit, and sell electricity by optimizing resource allocation and managing financial risks. Henry Neftzer's expertise guides investment decisions, capital structure management, and the financial reporting necessary for transparency with stakeholders and regulatory bodies. By driving financial efficiency, Neftzer directly contributes to the Grand River Dam Authority's ability to provide reliable and cost-effective energy solutions across Oklahoma and its neighboring states, underpinning the organization's long-term sustainability and growth.

    Matthew Martin - Deputy Chief Financial Officer

    Matthew Martin, the Deputy Chief Financial Officer at Grand River Dam Authority, supports the Chief Financial Officer in managing the organization's financial strategies and operations. Martin plays a key role in financial planning, analysis, and reporting, contributing to the fiscal stability and growth of the company. This position is integral to ensuring the Grand River Dam Authority can effectively generate, transmit, and sell electricity by providing robust financial oversight and support for capital projects and operational budgets. Matthew Martin's responsibilities include assisting with treasury functions, managing financial controls, and ensuring compliance with all relevant financial regulations. By reinforcing the financial department's capabilities, Martin helps maintain the organization's capacity to serve its diverse customer base reliably and efficiently.

    Tim Brown - Chief Operating Officer

    Tim Brown, the Chief Operating Officer at Grand River Dam Authority, directs the day-to-day operational activities essential for electricity generation, transmission, and sales. Brown oversees the management of power plants, grid infrastructure, and field operations, ensuring the reliable and efficient delivery of energy services to customers throughout Oklahoma and a four-state region. This critical role involves optimizing operational processes, implementing safety protocols, and managing resources to meet energy demands effectively. Tim Brown's leadership ensures that the Grand River Dam Authority adheres to the highest standards of operational excellence and environmental stewardship. By focusing on operational efficiency and reliability, Brown directly supports the company's mission and its commitment to serving municipalities, electric cooperatives, and industrial clients.
    Tim Brown

    Anthony Dionisio - Chief Information Officer

    Anthony Dionisio, the Chief Information Officer at Grand River Dam Authority, leads the strategic development and implementation of information technology across the organization. Dionisio is responsible for all aspects of IT infrastructure, cybersecurity, data management, and digital transformation initiatives, ensuring robust and secure technological operations. This position is vital for supporting the company's core business of generating, transmitting, and selling electricity by enhancing operational efficiency and enabling data-driven decision-making. Anthony Dionisio's focus includes leveraging technology to optimize energy grid management, improve customer service delivery, and safeguard sensitive corporate data. By driving technological advancement, Dionisio ensures the Grand River Dam Authority maintains a competitive edge and reliable service delivery to its diverse customer base.

    Angela Long - Chief People Officer

    Angela Long, the Chief People Officer at Grand River Dam Authority, leads human resources strategy and operations, focusing on talent management, employee development, and fostering a positive organizational culture. Long oversees recruitment, compensation, benefits, and employee relations, ensuring the Grand River Dam Authority attracts and retains a skilled workforce essential for its mission. This role is pivotal in supporting the company's operations by cultivating an engaged and productive team dedicated to generating, transmitting, and selling electricity reliably. Angela Long's strategic initiatives aim to enhance employee well-being, promote diversity and inclusion, and align human capital with the organization's business objectives. By prioritizing people, Long contributes to the Grand River Dam Authority's sustained success and its ability to serve its customers effectively.

    Robert Wheeler - Chief People Officer, Materials Control

    Robert Wheeler, the Chief People Officer, Materials Control at Grand River Dam Authority, integrates human resources leadership with oversight of materials management functions. Wheeler directs strategies for workforce development, talent acquisition, and employee engagement, while also ensuring efficient control and management of organizational materials. This dual focus is critical for supporting the company's energy generation and distribution operations by optimizing both human capital and essential resources. Robert Wheeler's responsibilities encompass developing personnel policies, managing inventory, and ensuring the availability of necessary materials for operational continuity. By aligning people strategies with material control, Wheeler enhances the Grand River Dam Authority's operational efficiency and its capacity to deliver reliable electricity services.

    Mary Edmundson - Superintendent Properties Administration Coordinator & Chief People Officer

    Mary Edmundson, the Superintendent Properties Administration Coordinator & Chief People Officer at Grand River Dam Authority, bridges human resources leadership with the administration and coordination of company properties. Edmundson oversees strategies for employee development and engagement, alongside managing property assets and administrative functions critical to the organization's infrastructure. This comprehensive role supports the Grand River Dam Authority's mission by ensuring both its workforce and its physical assets are optimally managed for reliable electricity generation and transmission. Mary Edmundson's responsibilities include developing HR policies, overseeing property maintenance, and coordinating administrative processes that enhance operational efficiency. By integrating people and property management, Edmundson contributes to the sustained operational integrity and service delivery of the Grand River Dam Authority.
    Mary Edmundson

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    Frequently Asked Questions Regarding Grand River Dam Authority Top Executives and Leadership Team

    Who leads Grand River Dam Authority?
    Grand River Dam Authority is led by Daniel Sullivan (President & Chief Executive Officer), along with executives such as Henry Neftzer (Chief Financial Officer) and Matthew Martin (Deputy Chief Financial Officer).
    Who is part of Grand River Dam Authority’s executive team?
    The executive team of Grand River Dam Authority includes leaders such as Daniel Sullivan (President & Chief Executive Officer), Henry Neftzer (Chief Financial Officer), Matthew Martin (Deputy Chief Financial Officer) and other senior executives.
    How many executives does Grand River Dam Authority have?
    Grand River Dam Authority has 8 executives leading key business areas.
    What roles are included in Grand River Dam Authority’s leadership team?
    The leadership team of Grand River Dam Authority includes roles such as President & Chief Executive Officer, Chief Financial Officer, Deputy Chief Financial Officer, Chief Operating Officer, Chief Information Officer.