HMG Executive and Leadership Team

Shawna Armstrong, the Chief Financial Officer at HMG, manages all fiscal planning, revenue cycle operations, and capital investment strategies. Overseeing the financial health of the medical group, the Chief Financial Officer ensures long-term sustainability through precise budgeting and resource management. This leadership role involves analyzing market trends to guide strategic growth in specialty healthcare services. By monitoring financial performance metrics, Shawna Armstrong directly impacts the ability of the organization to invest in advanced medical technology and facility expansion. Armstrong collaborates with the executive team to align fiscal objectives with the overarching mission of providing comprehensive patient care. Through disciplined financial oversight, the Chief Financial Officer mitigates economic risks while maximizing operational efficiency across all clinics. Ultimately, Armstrong maintains the fiscal integrity required to support the continued delivery of high-quality medical services throughout the regional network.

Samantha Sizemore, the Chief Operating Officer at HMG, directs all internal clinical workflows and administrative processes across the regional network. Overseeing daily facility management, the Chief Operating Officer ensures that family, pediatric, and geriatric healthcare services maintain consistent quality standards. This leadership role involves optimizing patient throughput and resource allocation to support the broader mission of accessible care. By streamlining operational protocols, Samantha Sizemore directly impacts the efficiency of medical delivery systems throughout the Tennessee service area. Sizemore coordinates with department heads to implement scalable solutions that address evolving patient needs. Through rigorous oversight of clinical support staff, the Chief Operating Officer drives organizational performance and operational stability. Ultimately, Sizemore secures the foundational infrastructure necessary for the medical group to provide high-quality, patient-centered healthcare services to the diverse populations served by the organization.

Darren Ramsey, the Chief Technology Officer & Chief Information Security Officer at HMG, architects the digital infrastructure and cybersecurity frameworks protecting sensitive patient data. Overseeing the integration of electronic health records and secure communication platforms, the Chief Technology Officer & Chief Information Security Officer ensures compliance with rigorous healthcare privacy standards. This leadership role involves deploying advanced diagnostic tools and telehealth capabilities to enhance patient access. By fortifying network defenses against emerging digital threats, Darren Ramsey directly impacts the reliability and safety of the medical group's technological ecosystem. Ramsey coordinates with clinical leadership to implement innovative software solutions that streamline patient care delivery. Through proactive management of information systems, the Chief Technology Officer & Chief Information Security Officer drives digital transformation across the organization. Ultimately, Ramsey secures the technological foundation necessary for modern, efficient, and protected healthcare operations.

Samuel Breeding, the Chief Medical Officer & Medical Director at HMG, governs clinical standards, physician performance, and evidence-based treatment protocols. Overseeing the quality of care across family, pediatric, and geriatric departments, the Chief Medical Officer & Medical Director ensures that all medical practices align with current industry benchmarks. This leadership role involves mentoring clinical staff and fostering a culture of continuous improvement in patient outcomes. By evaluating clinical efficacy and safety metrics, Samuel Breeding directly impacts the standard of care provided to the community. Breeding collaborates with the executive team to integrate new specialty services into the existing healthcare model. Through the oversight of medical staff credentialing and clinical policy development, the Chief Medical Officer & Medical Director drives excellence in patient-centered medicine. Ultimately, Breeding secures the clinical reputation and medical integrity of the organization through consistent, high-quality healthcare delivery.