Mackenzie Health Executive and Leadership Team

September, 2026

Leadership Overview

Mackenzie Health has 10 executives leading key functions including strategic oversight, digital health innovation, medical planning, financial management, and stakeholder relations.

Committed to advancing patient-centered care across Ontario, Mackenzie Health delivers comprehensive medical services ranging from oncology and pediatrics to intensive care while fostering community wellness through integrated health solutions.

Leadership Roles at Mackenzie Health

  • President & Chief Executive Officer - Nicole McCahon
  • Interim President & Chief Executive Officer - Mary-Agnes Wilson
  • President & Chief Executive Officer - Carmine Stumpo
  • Vice President, Finance & Chief Financial Officer - Gregory Chow
  • Member, President's Community Advisory Council - Loren Freid
  • Chief Information Officer - Diane Salois-Swallow
  • Chief Technology Officer - Patrick Harkins
  • Vice President, Digital Health & Chief Information Officer - Purvi Desai
  • Vice President, Medical Planning & Chief of Staff - Stephen Jackson
  • Vice President, Public Affairs & Chief Communications Officer, Stakeholder Relations - Allison Trenholm
  • Nicole McCahon - President & Chief Executive Officer

    Nicole McCahon, the President & Chief Executive Officer at Mackenzie Health, directs the overarching strategic vision for this Ontario-based healthcare provider. McCahon manages the delivery of specialized services including cancer care and pediatric programs to ensure high-quality patient outcomes. By aligning clinical goals with operational efficiency, the President & Chief Executive Officer maintains the standard of excellence required for complex hospital environments. McCahon coordinates with the board to secure long-term sustainability and growth across regional facilities. This leadership role involves navigating the evolving landscape of Canadian healthcare to meet diverse community needs. Through rigorous oversight of hospital operations, Nicole McCahon drives the mission of providing accessible, compassionate care. The President & Chief Executive Officer ultimately shapes the future of the organization by prioritizing innovation in medical service delivery and fostering a culture of continuous improvement within the clinical teams.

    Mary-Agnes Wilson - Interim President & Chief Executive Officer

    Mary-Agnes Wilson, the Interim President & Chief Executive Officer at Mackenzie Health, guides the organization through critical transitions while maintaining stability in core service areas. Wilson oversees the daily operations of intensive care units and mental health departments to ensure seamless patient support. As the Interim President & Chief Executive Officer, Wilson facilitates communication between clinical staff and administrative leadership to optimize resource allocation. This role requires balancing immediate operational demands with the long-term strategic objectives of the hospital network. Mary-Agnes Wilson monitors performance metrics to uphold safety standards and service quality across all departments. By streamlining internal processes, the Interim President & Chief Executive Officer enhances the effectiveness of healthcare delivery throughout the region. Wilson provides steady leadership during periods of change, ensuring that the commitment to patient care remains the primary focus of every department within the facility.

    Carmine Stumpo - President & Chief Executive Officer

    Carmine Stumpo, the President & Chief Executive Officer at Mackenzie Health, architects the strategic framework for expanding medical capabilities and enhancing patient access. Stumpo leads the development of advanced clinical programs, focusing on the integration of specialized care units to serve the growing population in Ontario. As the President & Chief Executive Officer, Stumpo collaborates with executive peers to align financial resources with medical priorities. This leadership position involves driving initiatives that improve the efficiency of cancer care and pediatric services. Carmine Stumpo evaluates organizational performance to ensure that the hospital meets rigorous provincial health standards. By fostering partnerships with community stakeholders, the President & Chief Executive Officer strengthens the regional impact of the healthcare system. Stumpo prioritizes the implementation of evidence-based practices to elevate the quality of care, ensuring that the organization remains a leader in providing comprehensive medical services to the community.
    Carmine Stumpo

    Gregory Chow - Vice President, Finance & Chief Financial Officer

    Gregory Chow, the Vice President, Finance & Chief Financial Officer at Mackenzie Health, manages the fiscal health and budgetary planning for the entire organization. Chow oversees financial reporting, revenue cycle management, and capital investment strategies to support the hospital's mission. As the Vice President, Finance & Chief Financial Officer, Chow ensures that resources are allocated efficiently across all clinical and administrative departments. This role involves analyzing financial data to identify opportunities for cost savings and operational improvements. Gregory Chow collaborates with the executive team to secure funding for new medical equipment and facility upgrades. By maintaining rigorous financial controls, the Vice President, Finance & Chief Financial Officer ensures the long-term sustainability of the healthcare provider. Chow drives the financial strategy, providing the necessary oversight to balance the demands of high-quality patient care with the realities of a complex, multi-facility hospital network.

    Loren Freid - Member, President's Community Advisory Council

    Loren Freid, the Member, President's Community Advisory Council at Mackenzie Health, provides essential community perspectives to the executive leadership team. Freid participates in discussions regarding the development of new health services and the improvement of existing patient programs. As a Member, President's Community Advisory Council, Freid acts as a liaison between the hospital and the local population, ensuring that community needs are reflected in strategic decisions. This role involves reviewing service delivery models to identify areas for increased accessibility and patient satisfaction. Loren Freid contributes to the evaluation of hospital initiatives, offering insights that help align organizational goals with the expectations of the public. By representing the community, the Member, President's Community Advisory Council supports the hospital's commitment to patient-centered care. Freid drives the engagement process, ensuring that the voices of the community are heard and considered in the ongoing development of the healthcare system.
    Loren Freid

    Diane Salois-Swallow - Chief Information Officer

    Diane Salois-Swallow, the Chief Information Officer at Mackenzie Health, manages the digital infrastructure necessary for modern hospital operations. Salois-Swallow oversees the implementation of electronic health records and data management systems to support clinical decision-making. As the Chief Information Officer, Salois-Swallow ensures the security and integrity of sensitive patient information across all digital platforms. This role involves coordinating with medical staff to integrate technology into daily workflows, thereby improving the speed and accuracy of care delivery. Diane Salois-Swallow directs the IT department to maintain robust network performance, which is essential for the functioning of intensive care and diagnostic services. By leveraging data analytics, the Chief Information Officer provides insights that help the executive team optimize hospital resources. Salois-Swallow drives the digital transformation of the organization, ensuring that technological advancements directly contribute to better patient outcomes and operational efficiency within the healthcare environment.

    Patrick Harkins - Chief Technology Officer

    Patrick Harkins, the Chief Technology Officer at Mackenzie Health, leads the development and deployment of cutting-edge medical technologies to enhance hospital capabilities. Harkins oversees the integration of advanced diagnostic tools and automated systems that support specialized care departments. As the Chief Technology Officer, Harkins ensures that the technical infrastructure remains scalable and resilient to meet the demands of a high-volume healthcare provider. This role involves evaluating emerging technologies to determine their potential for improving patient safety and clinical efficiency. Patrick Harkins collaborates with the IT and clinical teams to implement solutions that streamline complex medical procedures. By focusing on technical innovation, the Chief Technology Officer enables the organization to maintain a competitive edge in the delivery of specialized services. Harkins drives the adoption of modern hardware and software, ensuring that the hospital remains at the forefront of medical technology in the region.
    Patrick Harkins

    Purvi Desai - Vice President, Digital Health & Chief Information Officer

    Purvi Desai, the Vice President, Digital Health & Chief Information Officer at Mackenzie Health, directs the strategy for virtual care and digital patient engagement. Desai oversees the expansion of telehealth services, allowing for broader access to medical consultations across the region. As the Vice President, Digital Health & Chief Information Officer, Desai integrates digital health platforms with existing hospital systems to create a unified patient experience. This role involves managing the transition toward a more connected healthcare model that utilizes mobile applications and remote monitoring tools. Purvi Desai collaborates with clinical leaders to ensure that digital health initiatives align with the needs of patients in mental health and chronic care programs. By optimizing digital touchpoints, the Vice President, Digital Health & Chief Information Officer improves the accessibility of care. Desai drives the digital health agenda, ensuring that technology serves as a bridge between the hospital and the community.

    Stephen Jackson - Vice President, Medical Planning & Chief of Staff

    Stephen Jackson, the Vice President, Medical Planning & Chief of Staff at Mackenzie Health, coordinates the clinical workforce and long-term medical service planning. Jackson oversees the recruitment and retention of medical professionals to ensure adequate staffing for all departments, including pediatrics and intensive care. As the Vice President, Medical Planning & Chief of Staff, Jackson facilitates communication between the medical staff and the executive leadership team. This role involves developing strategic plans for facility expansion and service line growth to meet regional health demands. Stephen Jackson monitors clinical performance and adherence to medical standards to ensure the highest quality of patient care. By aligning medical resources with organizational goals, the Vice President, Medical Planning & Chief of Staff supports the overall mission of the hospital. Jackson drives the planning process for new medical programs, ensuring that the organization remains prepared to address the evolving health needs of the population.

    Allison Trenholm - Vice President, Public Affairs & Chief Communications Officer, Stakeholder Relations

    Allison Trenholm, the Vice President, Public Affairs & Chief Communications Officer, Stakeholder Relations at Mackenzie Health, manages the organization's reputation and external partnerships. Trenholm oversees public relations campaigns, community outreach, and government relations to ensure alignment with regional health priorities. As the Vice President, Public Affairs & Chief Communications Officer, Stakeholder Relations, Trenholm facilitates communication between the hospital and its diverse stakeholders, including donors and community leaders. This role involves crafting messaging that highlights the impact of the hospital's services, such as cancer care and mental health initiatives. Allison Trenholm coordinates events and media strategies to build public trust and support for the organization. By fostering strong relationships with external partners, the Vice President, Public Affairs & Chief Communications Officer, Stakeholder Relations strengthens the hospital's position in the community. Trenholm drives the communication strategy, ensuring that the mission and achievements of the organization are effectively conveyed to the public.
    Allison Trenholm

    Explore Leadership Teams in Hospitals & Physicians Clinics

    Frequently Asked Questions Regarding Mackenzie Health Top Executives and Leadership Team

    Who leads Mackenzie Health?
    Mackenzie Health is led by Nicole McCahon (President & Chief Executive Officer), along with executives such as Mary-Agnes Wilson (Interim President & Chief Executive Officer) and Carmine Stumpo (President & Chief Executive Officer).
    Who is part of Mackenzie Health’s executive team?
    The executive team of Mackenzie Health includes leaders such as Nicole McCahon (President & Chief Executive Officer), Mary-Agnes Wilson (Interim President & Chief Executive Officer), Carmine Stumpo (President & Chief Executive Officer) and other senior executives.
    How many executives does Mackenzie Health have?
    Mackenzie Health has 10 executives leading key business areas.
    What roles are included in Mackenzie Health’s leadership team?
    The leadership team of Mackenzie Health includes roles such as President & Chief Executive Officer, Interim President & Chief Executive Officer, President & Chief Executive Officer, Vice President, Finance & Chief Financial Officer, Member, President's Community Advisory Council.