HMG Executive and Leadership Team

July, 2026

Leadership Overview

HMG has 4 executives leading key functions including operations, finance, technology, and medical services.

Driven by a commitment to patient well-being, HMG delivers comprehensive family, pediatric, geriatric, and specialty healthcare services across Tennessee, prioritizing accessible and high-quality medical care.

Leadership Roles at HMG

  • Chief Financial Officer - Shawna Armstrong
  • Chief Operating Officer - Samantha Sizemore
  • Chief Technology Officer & Chief Information Security Officer - Darren Ramsey
  • Chief Medical Officer & Medical Director - Samuel Breeding
  • Shawna Armstrong - Chief Financial Officer

    Shawna Armstrong, the Chief Financial Officer at HMG, manages the financial health and strategic fiscal planning for the medical group. Armstrong oversees all financial operations, including budgeting, revenue cycle management, and financial reporting, ensuring HMG's fiscal stability and growth. This critical position involves developing financial strategies that support the expansion of services and maintain the affordability of care for patients. By meticulously managing financial resources, Shawna Armstrong enables HMG to invest in advanced medical technologies and expand its service offerings. The Chief Financial Officer's expertise is vital in navigating the complex healthcare reimbursement landscape and securing funding for operational improvements and capital expenditures. Armstrong's leadership ensures that HMG can continue its commitment to providing comprehensive healthcare services while maintaining a strong financial foundation.

    Samantha Sizemore - Chief Operating Officer

    Samantha Sizemore, the Chief Operating Officer at HMG, directs the operational framework supporting HMG's extensive healthcare services. Overseeing daily operations, Sizemore ensures the efficient delivery of family, pediatric, geriatric, and specialty care across all HMG facilities. This leadership role involves optimizing resource allocation and streamlining workflows to enhance patient access and satisfaction. By focusing on operational excellence, Samantha Sizemore directly contributes to HMG's mission of providing accessible, high-quality medical care. The Chief Operating Officer's responsibilities extend to managing administrative functions and ensuring seamless integration of new services and technologies within the existing operational structure. This strategic oversight guarantees that HMG's infrastructure consistently supports its clinical objectives and patient-centered approach, driving forward the group's capacity to serve the Kingsport, Tennessee community and beyond.

    Darren Ramsey - Chief Technology Officer & Chief Information Security Officer

    Darren Ramsey, the Chief Technology Officer & Chief Information Security Officer at HMG, architects and safeguards the organization's technological infrastructure and data security. Ramsey directs the implementation of innovative technology solutions that enhance patient care delivery and operational efficiency across HMG's healthcare services. This dual role demands a rigorous focus on information security, protecting sensitive patient data from evolving cyber threats. By leading technology strategy, Darren Ramsey ensures HMG remains at the forefront of digital health advancements, supporting seamless integration of electronic health records and telehealth platforms. The Chief Technology Officer & Chief Information Security Officer's oversight is crucial for maintaining compliance with healthcare regulations and fostering a secure digital environment. Ramsey's expertise drives HMG's technological capabilities, enabling superior patient outcomes and robust data protection.
    Darren Ramsey

    Samuel Breeding - Chief Medical Officer & Medical Director

    Samuel Breeding, the Chief Medical Officer & Medical Director at HMG, provides clinical leadership and directs medical strategy for the group's comprehensive healthcare services. Breeding oversees the quality of patient care, ensuring adherence to the highest medical standards across family, pediatric, geriatric, and specialty departments. This pivotal role involves guiding clinical teams, developing medical protocols, and fostering an environment of continuous improvement in patient outcomes. By championing evidence-based medicine, Samuel Breeding enhances the effectiveness and safety of care delivered by HMG physicians and staff. The Chief Medical Officer & Medical Director's influence extends to shaping HMG's clinical vision and ensuring alignment with its mission of providing accessible, high-quality healthcare. Breeding's leadership is fundamental to maintaining HMG's reputation for clinical excellence and patient trust.
    Samuel Breeding

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    Frequently Asked Questions Regarding HMG Top Executives and Leadership Team

    Who leads HMG?
    HMG is led by Shawna Armstrong (Chief Financial Officer), along with executives such as Samantha Sizemore (Chief Operating Officer) and Darren Ramsey (Chief Technology Officer & Chief Information Security Officer).
    Who is part of HMG’s executive team?
    The executive team of HMG includes leaders such as Shawna Armstrong (Chief Financial Officer), Samantha Sizemore (Chief Operating Officer), Darren Ramsey (Chief Technology Officer & Chief Information Security Officer) and other senior executives.
    How many executives does HMG have?
    HMG has 4 executives leading key business areas.
    What roles are included in HMG’s leadership team?
    The leadership team of HMG includes roles such as Chief Financial Officer, Chief Operating Officer, Chief Technology Officer & Chief Information Security Officer, Chief Medical Officer & Medical Director.