Catholic Health Executive and Leadership Team

October, 2026

Leadership Overview

Catholic Health has 10 executives leading key functions including strategy, operations, financial management, information technology, and marketing.

Committed to providing compassionate care, Catholic Health delivers comprehensive medical and surgical services to Nassau County residents while maintaining a century-long legacy of community-focused health excellence.

Leadership Roles at Catholic Health

  • Chief Executive Officer - Diane Day
  • Interim President, Chief Executive Officer & Chief Operating Officer - Gary Havican
  • Chief Financial Officer - William Allison
  • Chief Operating Officer - Donna Maraldo
  • Executive Vice President & Chief Operating Officer - Garrett Havican
  • Chief Information Officer - Jeff Cash
  • Chief Marketing Officer - Sunil Dhuper
  • Chief of Staff - Mitchel Untracht
  • Associate Chief Marketing Officer - Robert Carlin
  • Senior Vice President and Chief Marketing Officer - Tarek Zetoune
  • Diane Day - Chief Executive Officer

    Diane Day, the Chief Executive Officer at Catholic Health, directs the overarching strategic vision for the entire hospital network. Overseeing the integration of clinical services across the 375-bed facility, the Chief Executive Officer ensures that patient care standards remain consistent with the mission established by the Sisters of the Congregation of the Infant Jesus. Day manages high-level relationships with the Board to align institutional goals with evolving healthcare demands in New York. By prioritizing resource allocation for oncology and cardiology departments, the Chief Executive Officer strengthens the hospital's market position. This leadership role involves constant evaluation of medical outcomes to drive operational efficiency. Ultimately, Diane Day secures the long-term viability of the organization through rigorous oversight of all clinical and administrative functions, ensuring that the facility meets the complex needs of the surrounding communities.

    Gary Havican - Interim President, Chief Executive Officer & Chief Operating Officer

    Gary Havican, the Interim President, Chief Executive Officer & Chief Operating Officer at Catholic Health, executes daily operational workflows across the hospital system. Managing the complex logistics of a 375-bed facility, the Interim President, Chief Executive Officer & Chief Operating Officer optimizes internal processes to improve patient throughput in emergency and express care units. Havican coordinates with department heads to ensure that maternal health and rehabilitation services function at peak capacity. By streamlining supply chain management and staffing models, the Interim President, Chief Executive Officer & Chief Operating Officer directly impacts the quality of care delivered to Nassau County residents. This role requires balancing immediate operational needs with long-term institutional growth strategies. Gary Havican maintains a focus on operational excellence, ensuring that every medical department operates with maximum efficiency while upholding the core values of the organization.
    Gary Havican

    William Allison - Chief Financial Officer

    William Allison, the Chief Financial Officer at Catholic Health, manages the fiscal health and capital allocation strategies for the entire hospital network. Overseeing the budgeting process for all medical and surgical departments, the Chief Financial Officer ensures that resources support the expansion of pediatric subspecialties and weight-loss surgery programs. Allison monitors revenue cycles and cost-containment initiatives to maintain the financial stability of the not-for-profit institution. By analyzing market trends and operational expenditures, the Chief Financial Officer provides the data necessary for informed decision-making by the executive team. This leadership role involves navigating complex healthcare reimbursement landscapes to secure the funding required for facility upgrades. William Allison drives financial performance through disciplined oversight, ensuring that the organization remains capable of serving the healthcare needs of the community for another century.

    Donna Maraldo - Chief Operating Officer

    Donna Maraldo, the Chief Operating Officer at Catholic Health, directs the internal scaling and infrastructure development of the hospital's clinical departments. Focusing on the optimization of behavioral health and orthopedic services, the Chief Operating Officer implements protocols that enhance patient safety and care delivery speed. Maraldo coordinates with clinical leads to ensure that the Family Care Center maintains high standards of pediatric subspecialty access. By refining operational workflows, the Chief Operating Officer reduces bottlenecks in patient intake and discharge processes. This role involves managing the physical environment of the 375-bed facility to ensure compliance with state and federal healthcare regulations. Donna Maraldo drives operational improvements that directly support the hospital's mission, ensuring that all medical teams possess the necessary tools and support to provide exceptional care to the residents of Nassau County.

    Garrett Havican - Executive Vice President & Chief Operating Officer

    Garrett Havican, the Executive Vice President & Chief Operating Officer at Catholic Health, directs the long-term operational strategy and facility management for the hospital. Overseeing the expansion of maternal health and rehabilitation services, the Executive Vice President & Chief Operating Officer ensures that the physical infrastructure supports the growing needs of the community. Havican manages large-scale operational projects that improve the efficiency of the 375-bed facility. By focusing on the integration of new medical technologies and staff training programs, the Executive Vice President & Chief Operating Officer enhances the quality of care provided to patients. This role involves working closely with the Board to ensure that operational investments align with the hospital's long-term mission. Garrett Havican drives operational excellence, ensuring that the facility remains a premier destination for medical and surgical care in the region.

    Jeff Cash - Chief Information Officer

    Jeff Cash, the Chief Information Officer at Catholic Health, architects the digital infrastructure and health information systems that support clinical operations. Overseeing the implementation of electronic health records and secure data management, the Chief Information Officer ensures that medical staff have real-time access to patient information across all departments. Cash manages cybersecurity initiatives to protect sensitive health data while enabling seamless communication between pediatric specialists and primary care providers. By integrating advanced diagnostic technology into the hospital's workflow, the Chief Information Officer enhances the precision of oncology and cardiology services. This leadership role involves aligning technological investments with the broader strategic goals of the organization. Jeff Cash drives digital transformation, ensuring that the hospital utilizes modern tools to improve patient outcomes and operational efficiency throughout the entire New York facility.

    Sunil Dhuper - Chief Marketing Officer

    Sunil Dhuper, the Chief Marketing Officer at Catholic Health, directs the brand strategy and community outreach initiatives for the hospital system. Focusing on the promotion of specialized services like orthopedics and weight-loss surgery, the Chief Marketing Officer develops campaigns that increase awareness of the facility's comprehensive medical offerings. Dhuper manages public relations and community engagement to strengthen the hospital's reputation as a trusted healthcare provider in Nassau County. By analyzing patient demographics and market demand, the Chief Marketing Officer identifies opportunities to expand the reach of the Family Care Center. This role involves collaborating with clinical leaders to communicate the value of the hospital's unique medical services to the public. Sunil Dhuper drives growth by effectively positioning the organization as a leader in regional healthcare, ensuring that the community remains informed about available medical resources.

    Mitchel Untracht - Chief of Staff

    Mitchel Untracht, the Chief of Staff at Catholic Health, coordinates the administrative functions and strategic priorities of the executive leadership team. Overseeing the flow of information between the Board and the various clinical departments, the Chief of Staff ensures that organizational goals remain aligned with the mission of the Sisters of the Congregation of the Infant Jesus. Untracht manages high-level projects that span multiple medical disciplines, including the integration of new surgical services. By facilitating communication across the C-suite, the Chief of Staff enables rapid decision-making and effective execution of corporate initiatives. This role involves managing the executive office and ensuring that all leadership activities support the hospital's commitment to patient care. Mitchel Untracht drives organizational cohesion, ensuring that the leadership team functions as a unified force in addressing the healthcare needs of the community.

    Robert Carlin - Associate Chief Marketing Officer

    Robert Carlin, the Associate Chief Marketing Officer at Catholic Health, executes targeted digital marketing and patient acquisition strategies. Focusing on the promotion of 24-hour emergency and express care services, the Associate Chief Marketing Officer develops content that highlights the accessibility of the hospital for adults and children. Carlin manages the digital presence of the facility to ensure that residents of Nassau County can easily find information about available medical services. By tracking the performance of outreach campaigns, the Associate Chief Marketing Officer optimizes messaging to increase patient engagement. This role involves supporting the broader marketing department in maintaining a consistent brand identity across all platforms. Robert Carlin drives awareness of the hospital's comprehensive range of services, ensuring that the community understands the value of the care provided by the medical staff.

    Tarek Zetoune - Senior Vice President and Chief Marketing Officer

    Tarek Zetoune, the Senior Vice President and Chief Marketing Officer at Catholic Health, architects the comprehensive market positioning and growth strategy for the hospital. Overseeing the development of brand narratives that emphasize the hospital's century-long history, the Senior Vice President and Chief Marketing Officer ensures that the organization remains a top choice for healthcare in New York. Zetoune manages the strategic direction of all marketing efforts, including the promotion of specialized oncology and cardiology programs. By identifying emerging market trends, the Senior Vice President and Chief Marketing Officer guides the executive team in expanding the hospital's service footprint. This role involves high-level collaboration with other C-suite leaders to ensure that marketing initiatives support the overall financial and clinical goals of the organization. Tarek Zetoune drives market impact, ensuring that the hospital's reputation for excellence continues to grow.

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    Frequently Asked Questions Regarding Catholic Health Top Executives and Leadership Team

    Who leads Catholic Health?
    Catholic Health is led by Diane Day (Chief Executive Officer), along with executives such as Gary Havican (Interim President, Chief Executive Officer & Chief Operating Officer) and William Allison (Chief Financial Officer).
    Who is part of Catholic Health’s executive team?
    The executive team of Catholic Health includes leaders such as Diane Day (Chief Executive Officer), Gary Havican (Interim President, Chief Executive Officer & Chief Operating Officer), William Allison (Chief Financial Officer) and other senior executives.
    How many executives does Catholic Health have?
    Catholic Health has 10 executives leading key business areas.
    What roles are included in Catholic Health’s leadership team?
    The leadership team of Catholic Health includes roles such as Chief Executive Officer, Interim President, Chief Executive Officer & Chief Operating Officer, Chief Financial Officer, Chief Operating Officer, Executive Vice President & Chief Operating Officer.