Mass General Brigham Executive and Leadership Team

October, 2026

Leadership Overview

Mass General Brigham has 10 executives leading key functions including strategy, financial oversight, operational management, and human resources.

Committed to advancing medical research and patient care, Mass General Brigham integrates academic excellence with community health to transform clinical outcomes across the healthcare landscape.

Leadership Roles at Mass General Brigham

  • Chief Executive Officer - John Arrington
  • President & Chief Executive Officer - Rosanne Klibanski
  • Chief Financial Officer - Joseph Capezza
  • Chief Financial Officer & Treasurer - Niyum Gandhi
  • Senior Director, Operations & To The Chief of Staff & Chief Operating Officer, Amc & System Services - Rebecca Shait
  • President & Chief Operating Officer, Community & Specialty1 - Ruel Jackson
  • President & Chief Operating Officer, Spaulding Rehabilitation - Greg Jackson
  • Chief Information Officer, Site - David Rudek
  • Chief Human Resources Officer - Mary Schopp
  • Chief of Staff & Vice President, Corporate Service - Katharine Leeson
  • John Arrington - Chief Executive Officer

    John Arrington, the Chief Executive Officer at Mass General Brigham, directs the overarching strategic vision for this integrated healthcare network. Arrington manages the alignment of academic medical centers with community hospitals to ensure consistent quality across all patient care delivery models. By fostering collaboration between researchers and clinicians, the Chief Executive Officer accelerates the translation of scientific discoveries into practical clinical applications. This leadership role involves navigating complex regulatory environments while maintaining the financial health of the entire system. John Arrington drives initiatives that expand access to specialized services throughout the region, ensuring that the organization remains at the forefront of medical innovation. Through rigorous oversight of institutional goals, Arrington secures the long-term sustainability of the network, ultimately enhancing the standard of care provided to diverse patient populations within the broader healthcare ecosystem.

    Rosanne Klibanski - President & Chief Executive Officer

    Rosanne Klibanski, the President & Chief Executive Officer at Mass General Brigham, architects the comprehensive mission of this leading healthcare system. Klibanski oversees the integration of professional education and medical research, ensuring that the organization maintains its status as a premier teaching affiliate. By coordinating efforts across specialty facilities and outpatient services, the President & Chief Executive Officer drives operational excellence and clinical innovation. This leadership position requires constant engagement with the Board to refine long-term growth strategies and improve health outcomes for the communities served. Rosanne Klibanski champions the translation of complex medical knowledge into accessible patient care, reinforcing the commitment to quality and safety. Through strategic partnerships and internal alignment, Klibanski ensures that the entire network functions as a unified, high-performing entity dedicated to advancing the future of medicine.
    Rosanne Klibanski

    Joseph Capezza - Chief Financial Officer

    Joseph Capezza, the Chief Financial Officer at Mass General Brigham, manages the fiscal health and capital allocation strategies for this expansive healthcare system. Capezza directs the financial planning and analysis functions, ensuring that resources support the core mission of advancing patient care and medical research. By overseeing budgetary discipline across academic medical centers and community hospitals, the Chief Financial Officer maintains the economic stability necessary for long-term growth. This role involves evaluating investment opportunities in new medical technologies and infrastructure to enhance service delivery. Joseph Capezza collaborates with other executive leaders to align financial performance with the broader organizational goals of accessibility and quality. Through rigorous monitoring of revenue cycles and cost management, Capezza secures the financial foundation required to sustain the institution's leadership in academic medicine and clinical excellence.

    Niyum Gandhi - Chief Financial Officer & Treasurer

    Niyum Gandhi, the Chief Financial Officer & Treasurer at Mass General Brigham, oversees the treasury operations and long-term financial strategy for the organization. Gandhi manages the investment portfolio and liquidity requirements, ensuring that the system possesses the capital necessary to fund medical research and facility expansion. By directing the treasury functions, the Chief Financial Officer & Treasurer mitigates financial risk while optimizing the balance sheet for future growth. This leadership role involves close coordination with the Board to ensure transparency and fiscal responsibility in all corporate activities. Niyum Gandhi drives the development of financial models that support the integration of new specialty services into the existing network. Through strategic financial planning, Gandhi ensures that the organization remains well-positioned to invest in the next generation of healthcare professionals and clinical breakthroughs.
    Niyum Gandhi

    Rebecca Shait - Senior Director, Operations & To The Chief of Staff & Chief Operating Officer, Amc & System Services

    Rebecca Shait, the Senior Director, Operations & To The Chief of Staff & Chief Operating Officer, Amc & System Services at Mass General Brigham, coordinates complex operational workflows across the system. Shait manages the intersection of administrative functions and clinical service delivery, ensuring that academic medical centers operate with maximum efficiency. By streamlining processes between the Chief of Staff and operational teams, the Senior Director, Operations & To The Chief of Staff & Chief Operating Officer, Amc & System Services facilitates seamless communication and resource allocation. This role involves implementing standardized protocols that improve patient throughput and service quality. Rebecca Shait drives initiatives that optimize the performance of system-wide services, supporting the organization's commitment to continuous care. Through meticulous attention to operational detail, Shait enhances the overall effectiveness of the healthcare network's daily functions.
    Rebecca Shait

    Ruel Jackson - President & Chief Operating Officer, Community & Specialty1

    Ruel Jackson, the President & Chief Operating Officer, Community & Specialty1 at Mass General Brigham, directs the operational performance of community-based and specialty care facilities. Jackson manages the delivery of coordinated care across these diverse sites, ensuring that patient outcomes meet the high standards of the broader system. By overseeing the integration of community hospitals into the larger network, the President & Chief Operating Officer, Community & Specialty1 enhances accessibility for patients across the region. This role involves optimizing clinical workflows and resource utilization to improve efficiency in specialty service lines. Ruel Jackson drives initiatives that strengthen the connection between community care and academic medical centers, facilitating a continuous care model. Through focused operational leadership, Jackson ensures that specialty facilities remain responsive to the evolving health needs of the communities served.

    Greg Jackson - President & Chief Operating Officer, Spaulding Rehabilitation

    Greg Jackson, the President & Chief Operating Officer, Spaulding Rehabilitation at Mass General Brigham, leads the strategic and operational direction of the rehabilitation division. Jackson manages the delivery of specialized recovery services, ensuring that patients receive high-quality, evidence-based care. By overseeing the integration of rehabilitation protocols with the broader healthcare system, the President & Chief Operating Officer, Spaulding Rehabilitation facilitates a comprehensive approach to patient recovery. This role involves managing clinical staff, facility resources, and patient satisfaction metrics to maintain excellence in rehabilitation medicine. Greg Jackson drives operational improvements that enhance the effectiveness of recovery programs, supporting the organization's mission of improving health outcomes. Through dedicated leadership, Jackson ensures that the rehabilitation division remains a vital component of the integrated care network, providing essential support for patients transitioning from acute care to long-term wellness.
    Greg Jackson

    David Rudek - Chief Information Officer, Site

    David Rudek, the Chief Information Officer, Site at Mass General Brigham, directs the digital infrastructure and information technology strategy for specific clinical sites. Rudek manages the implementation of electronic health records and data security protocols, ensuring that clinicians have reliable access to patient information. By overseeing the deployment of advanced medical technologies, the Chief Information Officer, Site facilitates the digital transformation of clinical workflows. This role involves collaborating with medical staff to identify technology needs that improve diagnostic accuracy and patient care efficiency. David Rudek drives the integration of site-specific IT systems with the broader organizational network, ensuring data interoperability and system stability. Through proactive management of information technology resources, Rudek supports the organization's commitment to innovation and high-quality care delivery across all clinical environments.

    Mary Schopp - Chief Human Resources Officer

    Mary Schopp, the Chief Human Resources Officer at Mass General Brigham, manages the talent strategy and workforce development for the entire healthcare system. Schopp directs recruitment, retention, and professional development initiatives, ensuring that the organization attracts and maintains top-tier medical and administrative talent. By overseeing human resources policies across academic medical centers and community hospitals, the Chief Human Resources Officer fosters a culture of excellence and inclusivity. This role involves aligning workforce capabilities with the strategic goals of the institution, particularly in the areas of research and clinical education. Mary Schopp drives programs that support employee well-being and professional growth, which are essential for maintaining high standards of patient care. Through effective human capital management, Schopp ensures that the organization remains a preferred employer for healthcare professionals dedicated to advancing medical knowledge.

    Katharine Leeson - Chief of Staff & Vice President, Corporate Service

    Katharine Leeson, the Chief of Staff & Vice President, Corporate Service at Mass General Brigham, coordinates executive operations and corporate functions to support the organization's mission. Leeson manages the flow of information between the executive leadership team and the broader organization, ensuring strategic alignment on key initiatives. By overseeing corporate services, the Chief of Staff & Vice President, Corporate Service facilitates the efficient operation of administrative departments that support clinical and research activities. This role involves managing high-priority projects and serving as a liaison for the executive office. Katharine Leeson drives the implementation of corporate policies that enhance organizational effectiveness and operational transparency. Through meticulous coordination of corporate resources, Leeson ensures that the leadership team can focus on advancing patient care and medical innovation across the entire healthcare network.

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    Frequently Asked Questions Regarding Mass General Brigham Top Executives and Leadership Team

    Who leads Mass General Brigham?
    Mass General Brigham is led by John Arrington (Chief Executive Officer), along with executives such as Rosanne Klibanski (President & Chief Executive Officer) and Joseph Capezza (Chief Financial Officer).
    Who is part of Mass General Brigham’s executive team?
    The executive team of Mass General Brigham includes leaders such as John Arrington (Chief Executive Officer), Rosanne Klibanski (President & Chief Executive Officer), Joseph Capezza (Chief Financial Officer) and other senior executives.
    How many executives does Mass General Brigham have?
    Mass General Brigham has 10 executives leading key business areas.
    What roles are included in Mass General Brigham’s leadership team?
    The leadership team of Mass General Brigham includes roles such as Chief Executive Officer, President & Chief Executive Officer, Chief Financial Officer, Chief Financial Officer & Treasurer, Senior Director, Operations & To The Chief of Staff & Chief Operating Officer, Amc & System Services.