Health Sciences North Executive and Leadership Team

August, 2026

Leadership Overview

Health Sciences North has 7 executives leading key functions including strategy, clinical operations, financial management, information security, and medical staff governance.

Committed to excellence in patient care, Health Sciences North delivers specialized programs in cardiac care, oncology, and trauma rehabilitation to improve health outcomes across the region.

Leadership Roles at Health Sciences North

  • Chief Executive Officer - Marianne Mader
  • President and Chief Executive Officer Health Sciences North and Horizon Santé-Nord - David McNeil
  • Chief Financial Officer - Corissa Weghe
  • Interim Chief Financial Officer - Debbie McQuarrie
  • Anesthesiologist and A President of the Medical Staff - Peter Zalan
  • Chief Operations Officer - Stephanie Deschenes
  • Chief Information & Privacy Officer - Steve Volpini
  • Marianne Mader - Chief Executive Officer

    Marianne Mader, the Chief Executive Officer at Health Sciences North, directs the overarching strategic vision for all clinical and administrative departments. Mader architects long-term growth initiatives focused on expanding cardiac care and oncology services to meet rising regional demand. By aligning departmental goals with the broader mission of providing high-quality trauma and rehabilitation support, the Chief Executive Officer ensures operational excellence across the entire facility. Mader maintains constant communication with the Board to secure necessary resources for infrastructure upgrades and medical technology investments. Through rigorous oversight of hospital-wide performance metrics, Marianne Mader drives continuous improvement in patient safety and service delivery. This leadership role requires balancing complex budgetary constraints with the urgent need for advanced medical interventions. Ultimately, Mader fosters a culture of innovation that positions the organization as a premier provider of specialized healthcare services within the broader Ontario medical landscape.
    Marianne Mader

    David McNeil - President and Chief Executive Officer Health Sciences North and Horizon Santé-Nord

    David McNeil, the President and Chief Executive Officer Health Sciences North and Horizon Santé-Nord at Health Sciences North, manages the integration of complex healthcare delivery systems across diverse clinical environments. McNeil architects collaborative frameworks that unify cardiac care, nephrology, and rehabilitation programs under a single, cohesive operational strategy. By overseeing large-scale regional health initiatives, the President and Chief Executive Officer Health Sciences North and Horizon Santé-Nord ensures that patient care standards remain consistent across all service lines. McNeil coordinates with executive leadership to optimize resource allocation, thereby enhancing the efficiency of trauma and oncology departments. David McNeil drives organizational transformation by implementing evidence-based practices that elevate the quality of care provided to the community. This role involves navigating intricate regulatory requirements while maintaining a focus on sustainable growth. Through strategic partnerships and proactive management, McNeil secures the long-term viability of the institution as a critical hub for specialized medical services.

    Corissa Weghe - Chief Financial Officer

    Corissa Weghe, the Chief Financial Officer at Health Sciences North, manages the fiscal health and long-term economic stability of the organization. Weghe architects comprehensive financial strategies that support the expansion of oncology, nephrology, and cardiac care programs. By overseeing capital budgeting and revenue cycle management, the Chief Financial Officer ensures that resources remain available for critical trauma and rehabilitation services. Weghe collaborates with department heads to monitor operational expenditures and identify opportunities for cost-efficiency without compromising patient care quality. Corissa Weghe drives financial transparency and accountability, providing the Board with accurate reporting on fiscal performance and investment returns. This leadership role involves mitigating financial risks associated with healthcare delivery while maximizing the impact of available funding. Through meticulous planning and rigorous oversight, Weghe maintains the financial integrity required to support the hospital's mission of delivering advanced medical care to the surrounding population.
    Corissa Weghe

    Debbie McQuarrie - Interim Chief Financial Officer

    Debbie McQuarrie, the Interim Chief Financial Officer at Health Sciences North, executes immediate financial oversight and maintains fiscal continuity during periods of organizational transition. McQuarrie architects short-term budgetary adjustments that protect the funding of essential cardiac care and trauma services. By monitoring cash flow and operational expenses, the Interim Chief Financial Officer ensures that all departments possess the necessary capital to function effectively. McQuarrie collaborates with the executive team to streamline procurement processes and optimize resource utilization across the hospital. Debbie McQuarrie drives financial stability by implementing strict controls and reporting mechanisms that provide clarity on current economic performance. This role involves managing complex financial obligations while preparing the organization for future growth initiatives. Through diligent analysis and proactive fiscal management, McQuarrie supports the ongoing delivery of high-quality healthcare services, ensuring that the institution remains well-positioned to meet the evolving needs of the community.

    Peter Zalan - Anesthesiologist and A President of the Medical Staff

    Peter Zalan, the Anesthesiologist and A President of the Medical Staff at Health Sciences North, represents the interests of the clinical workforce while maintaining high standards of surgical care. Zalan architects collaborative relationships between the medical staff and hospital administration to ensure that cardiac care and trauma services receive adequate support. By overseeing the professional conduct and clinical quality of the medical team, the Anesthesiologist and A President of the Medical Staff drives excellence in patient safety. Zalan facilitates communication between physicians and executive leadership to address operational challenges and improve clinical outcomes. Peter Zalan maintains a focus on evidence-based practice, ensuring that all medical procedures align with current industry standards. This leadership role involves balancing the needs of individual practitioners with the broader goals of the hospital. Through active engagement and advocacy, Zalan fosters a professional environment that attracts and retains top-tier medical talent.

    Stephanie Deschenes - Chief Operations Officer

    Stephanie Deschenes, the Chief Operations Officer at Health Sciences North, directs the daily functional activities of all clinical and support departments. Deschenes architects efficient workflows that enhance the delivery of cardiac care, nephrology, and rehabilitation services. By overseeing facility management and patient flow logistics, the Chief Operations Officer ensures that trauma and oncology units operate at peak capacity. Deschenes collaborates with medical staff to implement process improvements that reduce wait times and increase patient satisfaction. Stephanie Deschenes drives operational excellence by integrating advanced technology into clinical routines and optimizing staff deployment across the hospital. This leadership role involves managing the complex interplay between administrative requirements and frontline medical needs. Through constant monitoring of operational KPIs, Deschenes identifies bottlenecks and executes solutions that improve overall service delivery. Ultimately, Deschenes maintains the high standards of care expected from a leading regional medical facility.

    Steve Volpini - Chief Information & Privacy Officer

    Steve Volpini, the Chief Information & Privacy Officer at Health Sciences North, architects the digital infrastructure and data security protocols essential for modern hospital operations. Volpini directs the implementation of electronic health record systems that support cardiac care, oncology, and nephrology departments. By overseeing cybersecurity measures and regulatory compliance, the Chief Information & Privacy Officer ensures the absolute protection of sensitive patient information. Volpini collaborates with clinical leaders to integrate data analytics into patient care workflows, thereby improving diagnostic accuracy and treatment outcomes. Steve Volpini drives digital transformation by modernizing IT systems to facilitate seamless communication between trauma and rehabilitation teams. This role involves managing the balance between technological innovation and strict privacy mandates. Through proactive risk assessment and robust system architecture, Volpini secures the integrity of the hospital's information assets, enabling the organization to provide reliable and secure medical services to the community.

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    Frequently Asked Questions Regarding Health Sciences North Top Executives and Leadership Team

    Who leads Health Sciences North?
    Health Sciences North is led by Marianne Mader (Chief Executive Officer), along with executives such as David McNeil (President and Chief Executive Officer Health Sciences North and Horizon Santé-Nord) and Corissa Weghe (Chief Financial Officer).
    Who is part of Health Sciences North’s executive team?
    The executive team of Health Sciences North includes leaders such as Marianne Mader (Chief Executive Officer), David McNeil (President and Chief Executive Officer Health Sciences North and Horizon Santé-Nord), Corissa Weghe (Chief Financial Officer) and other senior executives.
    How many executives does Health Sciences North have?
    Health Sciences North has 7 executives leading key business areas.
    What roles are included in Health Sciences North’s leadership team?
    The leadership team of Health Sciences North includes roles such as Chief Executive Officer, President and Chief Executive Officer Health Sciences North and Horizon Santé-Nord, Chief Financial Officer, Interim Chief Financial Officer, Anesthesiologist and A President of the Medical Staff.