HCA HealthONE Executive and Leadership Team

June, 2026

Leadership Overview

HCA HealthONE has 10 executives leading key functions including strategy, operations, and medical affairs.

Driven by a commitment to patient care, HCA HealthONE focuses on delivering high-quality outpatient and short-stay surgical procedures, enhancing community health through specialized ambulatory services.

Leadership Roles at HCA HealthONE

  • Chief Executive Officer - Scott Rausch
  • Administrator Chief Executive Officer - Roberto Brandon
  • Chief Operating Officer - Hallie Kosena
  • Chief Operating Officer, Behavioral Health Services - Aleah Horstman
  • Chief Operating Officer, HCA HealthONE Rose - Ashley Hickel
  • President - Adam Barkin
  • Registered Nurse Hyperbaric Medicine and President of Alfa Club of the Rockies - Scott Walker
  • Chief of Staff - Aaron Liddell
  • Chief Medical Officer - Chamisa MacIndoe
  • Chief Administrative Officer, , Rose Women's (CAO) - Kara Nicklas
  • Scott Rausch - Chief Executive Officer

    Scott Rausch, the Chief Executive Officer at HCA HealthONE, directs the overall strategic vision and operational execution for the organization. Overseeing all facets of the business, Scott Rausch ensures alignment with HCA HealthONE's mission to provide exceptional outpatient and short-stay surgical procedures. This leadership role involves driving growth initiatives, optimizing resource allocation, and fostering a culture of excellence across all facilities. By championing innovation in patient care delivery, Scott Rausch directly impacts the organization's market position and commitment to serving the Denver, Colorado community. The Chief Executive Officer's purview extends to financial performance, regulatory compliance, and stakeholder relations, solidifying HCA HealthONE's standing as a premier healthcare provider.
    Scott Rausch

    Roberto Brandon - Administrator Chief Executive Officer

    Roberto Brandon, the Administrator Chief Executive Officer at HCA HealthONE, manages the day-to-day administrative operations and executive leadership functions. Roberto Brandon ensures the seamless execution of HCA HealthONE's strategic objectives, focusing on operational efficiency and service delivery excellence. This position involves overseeing departmental coordination, implementing administrative policies, and driving process improvements to support outpatient and short-stay surgical procedures. By maintaining robust administrative frameworks, Roberto Brandon directly contributes to the organization's ability to provide high-quality patient care and maintain its strong presence in Denver, Colorado. The Administrator Chief Executive Officer's responsibilities include resource management, staff support, and ensuring compliance with healthcare regulations.

    Hallie Kosena - Chief Operating Officer

    Hallie Kosena, the Chief Operating Officer at HCA HealthONE, spearheads the operational strategies that underpin the delivery of outpatient and short-stay surgical procedures. Hallie Kosena oversees the efficient functioning of all clinical and administrative departments, ensuring optimal resource utilization and patient flow. This critical role involves implementing best practices in healthcare operations, driving service line development, and enhancing the overall patient experience. By focusing on operational excellence, Hallie Kosena directly supports HCA HealthONE's commitment to providing accessible and high-quality surgical care in the Denver, Colorado region. The Chief Operating Officer's leadership ensures that HCA HealthONE facilities operate at peak performance, meeting the evolving needs of the community.

    Aleah Horstman - Chief Operating Officer, Behavioral Health Services

    Aleah Horstman, the Chief Operating Officer, Behavioral Health Services at HCA HealthONE, directs the strategic development and operational management of behavioral health services. Aleah Horstman oversees the expansion and enhancement of specialized programs designed to address mental health needs, complementing HCA HealthONE's broader offerings in outpatient and short-stay surgical procedures. This leadership position focuses on ensuring the delivery of compassionate and effective care, optimizing patient access, and fostering clinical excellence within the behavioral health division. By driving innovation and operational efficiency in this critical area, Aleah Horstman directly supports HCA HealthONE's comprehensive approach to community well-being in Denver, Colorado. The Chief Operating Officer, Behavioral Health Services ensures integrated care models and high standards of treatment.
    Aleah Horstman

    Ashley Hickel - Chief Operating Officer, HCA HealthONE Rose

    Ashley Hickel, the Chief Operating Officer, HCA HealthONE Rose at HCA HealthONE, leads the operational strategy and execution specifically for the Rose facility. Ashley Hickel ensures that the Rose location delivers exceptional outpatient and short-stay surgical procedures, maintaining the highest standards of patient care and operational efficiency. This role involves overseeing all aspects of the facility's operations, from clinical services to administrative functions, driving performance improvements and fostering a patient-centered environment. By focusing on the unique needs and strategic direction of the Rose facility, Ashley Hickel directly contributes to HCA HealthONE's overall mission and its commitment to serving the Denver, Colorado community with specialized healthcare solutions. The Chief Operating Officer, HCA HealthONE Rose drives localized excellence and service innovation.

    Adam Barkin - President

    Adam Barkin, the President at HCA HealthONE, drives the strategic direction and overall growth of the organization. Adam Barkin oversees key business development initiatives, ensuring HCA HealthONE remains at the forefront of delivering advanced outpatient and short-stay surgical procedures. This leadership position involves fostering strong relationships with stakeholders, identifying new opportunities for service expansion, and championing the organization's mission within the healthcare industry. By focusing on strategic growth and market leadership, Adam Barkin directly contributes to HCA HealthONE's ability to enhance patient access to high-quality care in Denver, Colorado. The President's vision guides the organization's long-term success and commitment to community health.

    Scott Walker - Registered Nurse Hyperbaric Medicine and President of Alfa Club of the Rockies

    Scott Walker, the Registered Nurse Hyperbaric Medicine and President of Alfa Club of the Rockies at HCA HealthONE, brings specialized clinical expertise and leadership to patient care. Scott Walker oversees the provision of hyperbaric medicine services, ensuring patients receive advanced treatment for complex conditions, complementing HCA HealthONE's offerings in outpatient and short-stay surgical procedures. This dual role involves maintaining high clinical standards in hyperbaric therapy and leading community engagement initiatives through the Alfa Club of the Rockies. By focusing on specialized patient care and community involvement, Scott Walker directly contributes to HCA HealthONE's comprehensive healthcare approach and its commitment to the well-being of the Denver, Colorado area. The Registered Nurse Hyperbaric Medicine role ensures expert clinical delivery.

    Aaron Liddell - Chief of Staff

    Aaron Liddell, the Chief of Staff at HCA HealthONE, provides strategic support and operational coordination across executive functions. Aaron Liddell facilitates the execution of key initiatives, ensuring alignment between departmental goals and the overarching mission of delivering outpatient and short-stay surgical procedures. This position involves managing critical projects, enhancing communication channels between leadership and staff, and driving organizational effectiveness. By streamlining operations and supporting executive decision-making, Aaron Liddell directly contributes to HCA HealthONE's ability to provide exceptional patient care and maintain its leadership in the Denver, Colorado healthcare landscape. The Chief of Staff's role is integral to optimizing performance and advancing strategic priorities.

    Chamisa MacIndoe - Chief Medical Officer

    Chamisa MacIndoe, the Chief Medical Officer at HCA HealthONE, provides critical medical leadership and strategic oversight for clinical operations. Chamisa MacIndoe ensures the highest standards of patient care and safety are maintained across all outpatient and short-stay surgical procedures offered by HCA HealthONE. This role involves collaborating with physicians and clinical teams to implement evidence-based practices, drive quality improvement initiatives, and foster a culture of medical excellence. By guiding clinical strategy and ensuring physician alignment, Chamisa MacIndoe directly impacts the quality and effectiveness of healthcare services provided in the Denver, Colorado region. The Chief Medical Officer's expertise is vital for advancing HCA HealthONE's commitment to clinical innovation and patient outcomes.

    Kara Nicklas - Chief Administrative Officer, , Rose Women's (CAO)

    Kara Nicklas, the Chief Administrative Officer, Rose Women's (CAO) at HCA HealthONE, manages the comprehensive administrative functions supporting Rose Women's services. Kara Nicklas ensures the efficient and effective operation of administrative processes, facilitating the delivery of specialized care within HCA HealthONE's network of outpatient and short-stay surgical procedures. This role involves overseeing departmental coordination, implementing administrative policies, and optimizing resource management to support clinical teams and enhance patient services. By focusing on administrative excellence, Kara Nicklas directly contributes to the seamless operation of Rose Women's and HCA HealthONE's commitment to providing high-quality, patient-centered care in Denver, Colorado. The Chief Administrative Officer, Rose Women's (CAO) role is crucial for operational support.

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    Frequently Asked Questions Regarding HCA HealthONE Top Executives and Leadership Team

    Who leads HCA HealthONE?
    HCA HealthONE is led by Scott Rausch (Chief Executive Officer), along with executives such as Roberto Brandon (Administrator Chief Executive Officer) and Hallie Kosena (Chief Operating Officer).
    Who is part of HCA HealthONE’s executive team?
    The executive team of HCA HealthONE includes leaders such as Scott Rausch (Chief Executive Officer), Roberto Brandon (Administrator Chief Executive Officer), Hallie Kosena (Chief Operating Officer) and other senior executives.
    How many executives does HCA HealthONE have?
    HCA HealthONE has 10 executives leading key business areas.
    What roles are included in HCA HealthONE’s leadership team?
    The leadership team of HCA HealthONE includes roles such as Chief Executive Officer, Administrator Chief Executive Officer, Chief Operating Officer, Chief Operating Officer, Behavioral Health Services, Chief Operating Officer, HCA HealthONE Rose.