Mass General Brigham Executive and Leadership Team

August, 2026

Leadership Overview

Mass General Brigham has 10 executives leading key functions including strategy, financial oversight, technology, information systems, human resources, operations, and clinical marketing.

Committed to advancing patient care and medical research, Mass General Brigham integrates academic medical centers and community hospitals to translate scientific discovery into superior clinical outcomes.

Leadership Roles at Mass General Brigham

  • President & Chief Executive Officer - Rosanne Klibanski
  • Chief of Staff To the President and Chief Executive Officer - Peter Brown
  • Chief Financial Officer - David Lagasse
  • Chief Operating Officer, SRN - Ruel Jackson
  • Senior Director, Operations & To The Chief of Staff & Chief Operating Officer, Amc & System Services - Rebecca Shait
  • President & Chief Operating Officer - Kevin Whitney
  • Chief Technology Officer - Steven Flammini
  • Chief Information Officer - Brian Blackman
  • Chief Human Resources Officer - Mary Schopp
  • Family Physician, Chief Marketing Officer Greater Seacoast Community Health - Joann Buonomano
  • Rosanne Klibanski - President & Chief Executive Officer

    Rosanne Klibanski, the President & Chief Executive Officer at Mass General Brigham, directs the overarching strategic vision for this integrated healthcare system. By aligning academic medical centers with community hospitals, the President & Chief Executive Officer ensures seamless delivery of patient care across the entire network. Rosanne Klibanski manages high-level partnerships with Harvard Medical School to accelerate medical research and professional education. This leadership role involves balancing complex clinical demands with the necessity for continuous innovation in healthcare delivery. Through rigorous oversight of system-wide initiatives, the President & Chief Executive Officer maintains the organization's status as a premier teaching affiliate. By fostering a culture of excellence, the executive drives long-term growth and improves health outcomes for diverse communities. Ultimately, the President & Chief Executive Officer secures the financial and operational health of the institution while expanding the reach of clinical applications.
    Rosanne Klibanski

    Peter Brown - Chief of Staff To the President and Chief Executive Officer

    Peter Brown, the Chief of Staff To the President and Chief Executive Officer at Mass General Brigham, facilitates communication and strategic alignment across the executive leadership team. Overseeing the execution of high-priority initiatives, the Chief of Staff To the President and Chief Executive Officer ensures that the vision of the President is implemented effectively throughout the organization. Peter Brown directs the flow of information between the Board and the various clinical departments. This role involves managing complex projects that require cross-functional collaboration between academic medical centers and community hospitals. By streamlining executive decision-making, the Chief of Staff To the President and Chief Executive Officer enhances the agility of the entire system. The executive works to resolve operational bottlenecks and ensures that resources are directed toward the most critical strategic goals. Through meticulous coordination, the Chief of Staff To the President and Chief Executive Officer supports the organization's mission of advancing patient care and medical research.

    David Lagasse - Chief Financial Officer

    David Lagasse, the Chief Financial Officer at Mass General Brigham, manages the fiscal health and capital allocation strategies for this expansive healthcare network. Overseeing complex budgetary requirements, the Chief Financial Officer ensures that resources support both clinical operations and cutting-edge medical research. David Lagasse directs financial planning to maintain the stability of academic medical centers and community hospitals alike. This role involves rigorous analysis of revenue cycles and cost-efficiency measures to sustain high-quality patient care. By optimizing financial performance, the Chief Financial Officer enables the organization to invest in new technologies and infrastructure. The executive collaborates with other leaders to align fiscal goals with the broader mission of improving health outcomes. Through disciplined management of assets, the Chief Financial Officer supports the long-term sustainability of the entire system, ensuring that clinical services remain accessible and effective across all regional operations.
    David Lagasse

    Ruel Jackson - Chief Operating Officer, SRN

    Ruel Jackson, the Chief Operating Officer, SRN at Mass General Brigham, manages the daily operational workflows within the system's regional network. Overseeing the coordination between specialty facilities and outpatient services, the Chief Operating Officer, SRN ensures that clinical processes remain efficient and patient-centered. Ruel Jackson directs the implementation of standardized care protocols to improve health outcomes across the community hospitals. This role involves optimizing resource utilization and streamlining patient throughput to enhance accessibility. By monitoring operational metrics, the Chief Operating Officer, SRN identifies opportunities for process improvement and service expansion. The executive collaborates with clinical leadership to ensure that operational goals align with the broader mission of academic medicine. Through rigorous oversight of daily activities, the Chief Operating Officer, SRN maintains the high quality of care expected from the institution. This leadership role supports the overall stability and growth of the network by ensuring that all facilities operate at peak performance.

    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, manages the operational integration of academic medical centers and system-wide services. Overseeing the administrative support for the Chief of Staff and the Chief Operating Officer, the Senior Director, Operations & To The Chief of Staff & Chief Operating Officer, Amc & System Services ensures that complex clinical workflows remain synchronized. Rebecca Shait directs the implementation of operational policies that enhance the quality of care across the network. This role involves coordinating between various specialty facilities to ensure that resources are allocated efficiently. By facilitating communication between leadership and frontline staff, the Senior Director, Operations & To The Chief of Staff & Chief Operating Officer, Amc & System Services supports the organization's mission of improving health outcomes. Through detailed project management, the executive drives the success of system-wide initiatives that advance medical knowledge and patient accessibility.
    Rebecca Shait

    Kevin Whitney - President & Chief Operating Officer

    Kevin Whitney, the President & Chief Operating Officer at Mass General Brigham, oversees the execution of clinical strategies and the operational performance of the entire healthcare system. Managing the day-to-day activities of academic medical centers and community hospitals, the President & Chief Operating Officer ensures that the organization delivers high-quality, coordinated care. Kevin Whitney directs the expansion of specialty services to meet the evolving needs of the communities served. This role involves balancing the demands of clinical operations with the requirements of medical research and professional education. By optimizing the performance of the network, the President & Chief Operating Officer improves patient outcomes and enhances the efficiency of the institution. The executive collaborates with other leaders to ensure that operational goals support the long-term mission of the organization. Through strategic oversight, the President & Chief Operating Officer maintains the high standards of excellence that define the institution's role in academic medicine.

    Steven Flammini - Chief Technology Officer

    Steven Flammini, the Chief Technology Officer at Mass General Brigham, architects the digital infrastructure required to support advanced medical research and clinical care. Overseeing the integration of complex software systems, the Chief Technology Officer ensures that data flows securely between specialty facilities and outpatient services. Steven Flammini drives the adoption of innovative tools that translate scientific discoveries into practical clinical applications. This leadership role involves managing large-scale technical projects that enhance the efficiency of healthcare delivery across the network. By modernizing the technological landscape, the Chief Technology Officer enables physicians and researchers to access critical information in real time. The executive works closely with the Board to prioritize investments in emerging health technologies. Through strategic planning, the Chief Technology Officer maintains the competitive edge of the organization, ensuring that digital capabilities consistently improve patient outcomes and support the academic mission of the institution.

    Brian Blackman - Chief Information Officer

    Brian Blackman, the Chief Information Officer at Mass General Brigham, manages the enterprise-wide data architecture and information security protocols. Overseeing the integrity of patient records and research databases, the Chief Information Officer ensures compliance with rigorous healthcare standards. Brian Blackman directs the implementation of robust information systems that connect academic medical centers with community hospitals. This role involves mitigating cyber risks while facilitating seamless communication between clinical teams. By optimizing data accessibility, the Chief Information Officer supports the organization's commitment to coordinated and continuous care. The executive collaborates with other C-suite leaders to align information strategy with the broader goals of medical education and patient safety. Through the deployment of advanced analytics, the Chief Information Officer provides actionable insights that drive operational improvements. Ultimately, the Chief Information Officer secures the digital foundation necessary for the institution to deliver high-quality, evidence-based medicine across all service lines.

    Mary Schopp - Chief Human Resources Officer

    Mary Schopp, the Chief Human Resources Officer at Mass General Brigham, leads the talent acquisition and workforce development strategies for this massive healthcare network. Overseeing the recruitment of physicians, nurses, and researchers, the Chief Human Resources Officer ensures that the organization maintains a high standard of professional excellence. Mary Schopp directs initiatives focused on employee engagement, retention, and leadership training within the academic medical environment. This role involves fostering an inclusive culture that supports the diverse needs of staff across specialty facilities and community hospitals. By aligning human capital with the mission of improving health outcomes, the Chief Human Resources Officer strengthens the institution's ability to deliver coordinated care. The executive works with other leaders to implement policies that promote professional growth and operational efficiency. Through strategic workforce planning, the Chief Human Resources Officer ensures that the organization remains a top destination for healthcare professionals dedicated to advancing medical knowledge.

    Joann Buonomano - Family Physician, Chief Marketing Officer Greater Seacoast Community Health

    Joann Buonomano, the Family Physician, Chief Marketing Officer Greater Seacoast Community Health at Mass General Brigham, directs the outreach and communication strategies for community-based health services. Overseeing the promotion of accessible care, the Family Physician, Chief Marketing Officer Greater Seacoast Community Health ensures that the organization's mission reaches diverse populations. Joann Buonomano manages the messaging that connects patients with the system's specialty facilities and academic medical centers. This role involves translating complex medical information into clear, actionable guidance for the public. By building strong relationships with community stakeholders, the Family Physician, Chief Marketing Officer Greater Seacoast Community Health enhances the visibility and impact of the institution. The executive works to align marketing efforts with the broader goals of improving health outcomes and advancing medical knowledge. Through targeted communication, the Family Physician, Chief Marketing Officer Greater Seacoast Community Health supports the organization's commitment to providing high-quality, continuous care to all patients.

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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 Rosanne Klibanski (President & Chief Executive Officer), along with executives such as Peter Brown (Chief of Staff To the President and Chief Executive Officer) and David Lagasse (Chief Financial Officer).
    Who is part of Mass General Brigham’s executive team?
    The executive team of Mass General Brigham includes leaders such as Rosanne Klibanski (President & Chief Executive Officer), Peter Brown (Chief of Staff To the President and Chief Executive Officer), David Lagasse (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 President & Chief Executive Officer, Chief of Staff To the President and Chief Executive Officer, Chief Financial Officer, Chief Operating Officer, SRN, Senior Director, Operations & To The Chief of Staff & Chief Operating Officer, Amc & System Services.