Arlington County, Virginia Executive and Leadership Team

June, 2026

Leadership Overview

Arlington County Government has 7 executives leading key functions including technology, finance, operations, administration, and staff management.

Dedicated to serving its residents, Arlington County, Virginia provides essential local services and information, fostering a connected and informed community through efficient governance and transparent operations.

Leadership Roles at Arlington County, Virginia

  • Chief Financial Officer - Michelle Cowan
  • Deputy Chief Financial Officer - Michael Stewart
  • Director, Management and Finance. Chief Financial Officer - Maria Meredith
  • Chief Operating Officer & Deputy Chief Information Officer - Laura Szlavin-Niamien
  • Chief Information Officer - Holly Hartell
  • Chief of Staff & Manager, Office of The County - Lynne Porfiri
  • Chief Administrative Officer - Cynthia Hernan
  • Michelle Cowan - Chief Financial Officer

    Michelle Cowan, the Chief Financial Officer at Arlington County Government, manages the county's fiscal health and financial planning. Overseeing all financial operations, Cowan ensures fiscal responsibility and strategic resource allocation to support county initiatives. This critical role involves developing and executing the county's budget, managing investments, and ensuring compliance with financial regulations. By providing sound financial guidance, Michelle Cowan directly contributes to the county's ability to deliver essential services and maintain economic stability. The Chief Financial Officer's expertise is vital in navigating complex financial landscapes and securing the resources necessary for community development and public welfare. Cowan's leadership ensures the long-term financial sustainability of Arlington County Government.

    Michael Stewart - Deputy Chief Financial Officer

    Michael Stewart, the Deputy Chief Financial Officer at Arlington County Government, supports the Chief Financial Officer in managing the county's financial operations. Assisting with budget development and financial analysis, Stewart ensures the accuracy and integrity of financial reporting. This role involves contributing to fiscal planning, monitoring expenditures, and implementing financial controls to maintain accountability. By providing critical financial support, Michael Stewart aids in the effective allocation of resources to meet community needs. The Deputy Chief Financial Officer's contributions are essential for upholding the county's commitment to fiscal prudence and transparency. Stewart's work reinforces the financial stability required for Arlington County Government's ongoing service delivery.

    Maria Meredith - Director, Management and Finance. Chief Financial Officer

    Maria Meredith, the Director, Management and Finance. Chief Financial Officer at Arlington County Government, oversees critical management and financial functions. Directing departmental operations, Meredith ensures efficient resource utilization and strategic financial planning to support county objectives. This leadership position involves guiding financial policy, managing departmental budgets, and fostering operational improvements across management and finance divisions. By driving effective financial stewardship, Maria Meredith contributes to the county's overall economic health and service delivery capabilities. The Director, Management and Finance's expertise is key to maintaining fiscal integrity and supporting community development initiatives. Meredith's leadership enhances the county's capacity for sustainable growth and public service excellence.

    Laura Szlavin-Niamien - Chief Operating Officer & Deputy Chief Information Officer

    Laura Szlavin-Niamien, the Chief Operating Officer & Deputy Chief Information Officer at Arlington County Government, drives operational efficiency and technological integration. Overseeing daily operations and supporting IT strategy, Szlavin-Niamien ensures seamless service delivery and robust technological infrastructure. This dual role involves managing cross-departmental workflows, optimizing resource allocation, and advancing the county's digital transformation initiatives. By enhancing operational processes and leveraging technology, Laura Szlavin-Niamien directly supports the county's mission to serve its residents effectively. The Chief Operating Officer & Deputy Chief Information Officer's leadership is crucial for maintaining high standards of public service and ensuring technological readiness. Szlavin-Niamien's strategic oversight strengthens both the operational backbone and the digital capabilities of Arlington County Government.

    Holly Hartell - Chief Information Officer

    Holly Hartell, the Chief Information Officer at Arlington County Government, directs the county's technology strategy and infrastructure. Overseeing all IT operations, Hartell ensures the delivery of secure and reliable digital services to residents and county employees. This leadership role involves managing the county's technology budget, implementing innovative solutions, and safeguarding sensitive data against cyber threats. By driving technological advancements, Holly Hartell supports the county's mission to provide efficient and accessible public services. The Chief Information Officer's responsibilities extend to fostering digital inclusion and enhancing the county's online presence, ensuring seamless access to information and resources for all constituents. Hartell's strategic vision guides the modernization of government IT systems, promoting operational excellence across all departments.

    Lynne Porfiri - Chief of Staff & Manager, Office of The County

    Lynne Porfiri, the Chief of Staff & Manager, Office of The County at Arlington County Government, provides strategic leadership and operational oversight. Managing key county initiatives and interdepartmental coordination, Porfiri ensures alignment with the county's strategic objectives. This executive position involves advising county leadership, facilitating policy development, and overseeing the efficient functioning of the County Manager's office. By streamlining operations and enhancing communication channels, Lynne Porfiri supports the effective delivery of public services. The Chief of Staff & Manager's role is integral to driving administrative efficiency and implementing the county's vision for community improvement. Porfiri's guidance strengthens the county's governance structure and operational effectiveness.

    Cynthia Hernan - Chief Administrative Officer

    Cynthia Hernan, the Chief Administrative Officer at Arlington County Government, directs administrative functions and supports strategic organizational development. Overseeing key administrative departments, Hernan ensures efficient internal operations and compliance with county policies. This executive role involves managing human resources, facilities, and other essential administrative services that underpin the county's public service delivery. By optimizing administrative processes and fostering a productive work environment, Cynthia Hernan contributes to the overall effectiveness of Arlington County Government. The Chief Administrative Officer's leadership is vital for maintaining organizational integrity and supporting the county's workforce. Hernan's focus on administrative excellence enhances the county's capacity to serve its constituents.

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    Frequently Asked Questions Regarding Arlington County, Virginia Top Executives and Leadership Team

    Who leads Arlington County, Virginia?
    Arlington County, Virginia is led by Michelle Cowan (Chief Financial Officer), along with executives such as Michael Stewart (Deputy Chief Financial Officer) and Maria Meredith (Director, Management and Finance. Chief Financial Officer).
    Who is part of Arlington County, Virginia’s executive team?
    The executive team of Arlington County, Virginia includes leaders such as Michelle Cowan (Chief Financial Officer), Michael Stewart (Deputy Chief Financial Officer), Maria Meredith (Director, Management and Finance. Chief Financial Officer) and other senior executives.
    How many executives does Arlington County, Virginia have?
    Arlington County, Virginia has 7 executives leading key business areas.
    What roles are included in Arlington County, Virginia’s leadership team?
    The leadership team of Arlington County, Virginia includes roles such as Chief Financial Officer, Deputy Chief Financial Officer, Director, Management and Finance. Chief Financial Officer, Chief Operating Officer & Deputy Chief Information Officer, Chief Information Officer.