Eastman Credit Union Executive and Leadership Team

October, 2026

Leadership Overview

Eastman Credit Union has 5 executives leading key functions including operations, financial management, human resources, administration, and legal counsel.

Committed to member-focused financial excellence, Eastman Credit Union delivers comprehensive banking, investment, and retirement solutions while maintaining a strong foundation of community-based service and long-term fiscal stability.

Leadership Roles at Eastman Credit Union

  • Executive Vice President & Chief Financial Officer - Tonja Fish
  • Chief Operating Officer - Jeremiah Lounds
  • Vice President, Chief Human Resources Officer - Mark Millwood
  • Chief Administrative Officer - Darrell Dinsmore
  • Chief Legal Officer & General Counsel - Matthew Wimberley
  • Tonja Fish - Executive Vice President & Chief Financial Officer

    Tonja Fish, the Executive Vice President & Chief Financial Officer at Eastman Credit Union, manages the fiscal health and capital allocation strategies of the organization. Overseeing the treasury, financial reporting, and investment portfolios, the Executive Vice President & Chief Financial Officer ensures long-term solvency and regulatory compliance. This leadership role involves analyzing market trends to guide interest rate policies and asset management decisions. By maintaining robust financial controls, Tonja Fish directly impacts the stability of the credit union and the security of member deposits. Fish collaborates with the board to align budgetary priorities with the strategic vision of the institution. Through the precise management of capital reserves and liquidity, the Executive Vice President & Chief Financial Officer supports sustainable growth, ensuring that the financial foundation remains strong enough to withstand economic fluctuations while providing competitive returns on investment products.
    Tonja Fish

    Jeremiah Lounds - Chief Operating Officer

    Jeremiah Lounds, the Chief Operating Officer at Eastman Credit Union, directs all internal workflows and service delivery mechanisms. Overseeing the daily execution of personal and business banking operations, the Chief Operating Officer ensures seamless integration across all regional branches. This leadership role involves optimizing transaction processing speeds and enhancing member accessibility through digital channels. By refining operational protocols, Jeremiah Lounds directly impacts the efficiency of loan origination and account management systems. Lounds maintains rigorous standards for service quality, ensuring that every financial interaction aligns with the broader institutional goals of reliability and growth. Through the continuous assessment of operational metrics, the Chief Operating Officer drives improvements in service delivery, ultimately securing the competitive position of the institution within the broader financial landscape while supporting the diverse needs of the membership base.

    Mark Millwood - Vice President, Chief Human Resources Officer

    Mark Millwood, the Vice President, Chief Human Resources Officer at Eastman Credit Union, architects the talent acquisition and organizational development strategies. Overseeing workforce planning, employee benefits, and professional training programs, the Vice President, Chief Human Resources Officer ensures the alignment of human capital with the service-oriented mission of the institution. This leadership role involves fostering a culture of excellence and professional growth across all departments. By implementing performance management systems, Mark Millwood directly impacts the quality of member service and internal productivity. Millwood drives initiatives to attract top talent and retain skilled professionals, ensuring that the workforce remains capable of meeting complex financial demands. Through the strategic oversight of organizational culture and employee engagement, the Vice President, Chief Human Resources Officer supports the overall operational success of the credit union, maintaining a high-performing environment that consistently delivers value to the membership.

    Darrell Dinsmore - Chief Administrative Officer

    Darrell Dinsmore, the Chief Administrative Officer at Eastman Credit Union, governs the infrastructure and administrative support systems that facilitate daily business activities. Overseeing facilities management, procurement, and internal administrative policies, the Chief Administrative Officer ensures that the physical and digital environments support the broader organizational objectives. This leadership role involves streamlining internal processes to reduce overhead and improve organizational agility. By coordinating cross-departmental administrative functions, Darrell Dinsmore directly impacts the efficiency of the entire institution. Dinsmore manages vendor relationships and infrastructure projects, ensuring that all resources are utilized effectively to support the delivery of financial services. Through the rigorous oversight of administrative standards, the Chief Administrative Officer maintains a cohesive operational framework, allowing the credit union to focus on member needs while ensuring that all internal support systems remain robust, scalable, and fully aligned with the long-term strategic goals of the organization.
    Darrell Dinsmore
    Matthew Wimberley, the Chief Legal Officer & General Counsel at Eastman Credit Union, directs the legal strategy and regulatory compliance framework for the entire institution. Overseeing risk management, contract negotiations, and corporate governance, the Chief Legal Officer & General Counsel ensures that all financial products and services adhere to federal and state banking regulations. This leadership role involves providing counsel on complex legal matters to the board and executive team. By mitigating legal risks and ensuring ethical conduct, Matthew Wimberley directly impacts the reputation and integrity of the credit union. Wimberley manages litigation and regulatory inquiries, protecting the interests of the organization and its members. Through the proactive identification of legal challenges, the Chief Legal Officer & General Counsel supports the safe expansion of services, ensuring that all business activities remain within the bounds of the law while fostering a culture of transparency and accountability across the enterprise.

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    Frequently Asked Questions Regarding Eastman Credit Union Top Executives and Leadership Team

    Who leads Eastman Credit Union?
    Eastman Credit Union is led by Tonja Fish (Executive Vice President & Chief Financial Officer), along with executives such as Jeremiah Lounds (Chief Operating Officer) and Mark Millwood (Vice President, Chief Human Resources Officer).
    Who is part of Eastman Credit Union’s executive team?
    The executive team of Eastman Credit Union includes leaders such as Tonja Fish (Executive Vice President & Chief Financial Officer), Jeremiah Lounds (Chief Operating Officer), Mark Millwood (Vice President, Chief Human Resources Officer) and other senior executives.
    How many executives does Eastman Credit Union have?
    Eastman Credit Union has 5 executives leading key business areas.
    What roles are included in Eastman Credit Union’s leadership team?
    The leadership team of Eastman Credit Union includes roles such as Executive Vice President & Chief Financial Officer, Chief Operating Officer, Vice President, Chief Human Resources Officer, Chief Administrative Officer, Chief Legal Officer & General Counsel.