Montefiore Nyack Executive and Leadership Team

October, 2026

Leadership Overview

Montefiore Nyack has 4 executives leading key functions including strategy, financial oversight, information management, and clinical operations.

Committed to excellence in patient care, Montefiore Nyack delivers advanced medical and surgical services while maintaining a focus on community health and operational integrity across the region.

Leadership Roles at Montefiore Nyack

  • President & Chief Executive Officer - Mark Geller
  • Vice President & Chief Financial Officer - Mark Mercurio
  • Vice President & Chief Medical Officer - Anthony Matejicka
  • Cim - Liji Joseph
  • Mark Geller - President & Chief Executive Officer

    Mark Geller, the President & Chief Executive Officer at Montefiore Nyack, directs the overarching strategic vision for the medical and surgical hospital. Overseeing the entire organizational structure, the President & Chief Executive Officer ensures alignment between clinical excellence and long-term institutional growth. This leadership role involves managing complex stakeholder relationships and driving initiatives that enhance patient outcomes across the New York region. By fostering a culture of innovation, Mark Geller maintains the hospital's competitive position within the healthcare landscape. The President & Chief Executive Officer coordinates with the Board to secure financial sustainability while expanding service lines to meet evolving community needs. Through rigorous oversight of hospital operations, the President & Chief Executive Officer guarantees that all departments adhere to the highest standards of safety and quality care, ultimately strengthening the reputation of the institution as a premier provider of medical services.

    Mark Mercurio - Vice President & Chief Financial Officer

    Mark Mercurio, the Vice President & Chief Financial Officer at Montefiore Nyack, manages the fiscal health and resource allocation for the medical and surgical hospital. Overseeing the financial planning and analysis departments, the Vice President & Chief Financial Officer ensures the institution maintains robust capital reserves to support ongoing medical advancements. This leadership role involves optimizing revenue cycles and controlling operational costs to maximize efficiency across all clinical units. By implementing data-driven financial strategies, Mark Mercurio secures the necessary funding for infrastructure upgrades and new technology acquisitions. The Vice President & Chief Financial Officer collaborates with executive leadership to evaluate the economic impact of new service lines and regional expansion efforts. Through precise budget management and risk assessment, the Vice President & Chief Financial Officer protects the long-term financial viability of the hospital, ensuring consistent delivery of high-quality care to the community.

    Anthony Matejicka - Vice President & Chief Medical Officer

    Anthony Matejicka, the Vice President & Chief Medical Officer at Montefiore Nyack, directs the clinical standards and medical staff performance for the medical and surgical hospital. Overseeing the quality of care initiatives, the Vice President & Chief Medical Officer ensures that all surgical and medical practices meet rigorous safety benchmarks. This leadership role involves managing physician relations and fostering a collaborative environment among the clinical teams to enhance patient outcomes. By implementing evidence-based protocols, Anthony Matejicka drives continuous improvement in clinical workflows and patient safety measures. The Vice President & Chief Medical Officer coordinates with the executive team to align medical services with the hospital's strategic goals, ensuring that the facility remains at the forefront of regional healthcare delivery. Through the oversight of clinical governance, the Vice President & Chief Medical Officer maintains high standards of excellence, directly impacting the quality of medical services provided to the community.

    Liji Joseph - Cim

    Liji Joseph, the Cim at Montefiore Nyack, directs the information management and digital infrastructure for the medical and surgical hospital. Overseeing the integration of health information systems, the Cim ensures seamless data flow between clinical departments to improve patient care coordination. This leadership role involves architecting secure digital environments that protect sensitive health records while enabling efficient access for medical staff. By modernizing the technological framework, Liji Joseph drives operational efficiency and supports the adoption of advanced diagnostic tools. The Cim collaborates with other executive leaders to align digital initiatives with the broader mission of the hospital, facilitating better decision-making through real-time data analytics. Through the implementation of robust cybersecurity protocols, the Cim safeguards the integrity of the hospital's information assets, ensuring that all digital systems remain reliable and compliant with industry standards for patient privacy and data security.

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    Frequently Asked Questions Regarding Montefiore Nyack Top Executives and Leadership Team

    Who leads Montefiore Nyack?
    Montefiore Nyack is led by Mark Geller (President & Chief Executive Officer), along with executives such as Mark Mercurio (Vice President & Chief Financial Officer) and Anthony Matejicka (Vice President & Chief Medical Officer).
    Who is part of Montefiore Nyack’s executive team?
    The executive team of Montefiore Nyack includes leaders such as Mark Geller (President & Chief Executive Officer), Mark Mercurio (Vice President & Chief Financial Officer), Anthony Matejicka (Vice President & Chief Medical Officer) and other senior executives.
    How many executives does Montefiore Nyack have?
    Montefiore Nyack has 4 executives leading key business areas.
    What roles are included in Montefiore Nyack’s leadership team?
    The leadership team of Montefiore Nyack includes roles such as President & Chief Executive Officer, Vice President & Chief Financial Officer, Vice President & Chief Medical Officer, Cim.