CIBC Mellon Executive and Leadership Team

June, 2026

Leadership Overview

CIBC Mellon has 5 executives leading key functions including strategy, finance, human resources, technology, and operations.

Driven by a commitment to institutional investment servicing, CIBC Mellon focuses on delivering robust solutions for Canadian and international clients, fostering trust and operational excellence within the financial sector.

Leadership Roles at CIBC Mellon

  • Chief Executive Officer - Mal Cullen
  • Chief Financial Officer - John Riviere
  • Chief Human Resources Officer - Maple Tam
  • Head of Technology Enterprise Security Chief Technology Officer & Chief Information Security Officer - Mike Plantinga
  • Chief Operations Officer - Catherine Thrasher
  • Mal Cullen - Chief Executive Officer

    Mal Cullen, the Chief Executive Officer at CIBC Mellon, directs the overall strategic vision and operational framework for the company. Overseeing all business units, Cullen ensures alignment with the core mission of providing investment servicing to Canadian and international institutional investors. This leadership role involves driving market expansion and enhancing client relationships across North America. By focusing on innovation and service excellence, Mal Cullen guides CIBC Mellon's trajectory in the competitive financial landscape. The Chief Executive Officer's purview encompasses financial performance, regulatory compliance, and long-term growth initiatives, solidifying the company's position as a trusted partner in asset servicing.

    John Riviere - Chief Financial Officer

    John Riviere, the Chief Financial Officer at CIBC Mellon, manages all financial operations and strategic financial planning. Overseeing accounting, treasury, and financial reporting, Riviere ensures fiscal integrity and drives profitability for the organization. This critical role involves developing financial strategies that support CIBC Mellon's growth objectives and maintain strong investor confidence. By optimizing resource allocation and managing financial risks, John Riviere directly contributes to the company's stability and expansion within the Canadian and international markets. The Chief Financial Officer's responsibilities extend to capital management, budgeting, and providing key financial insights to the executive team and board, underpinning the company's operational success.
    John Riviere

    Maple Tam - Chief Human Resources Officer

    Maple Tam, the Chief Human Resources Officer at CIBC Mellon, leads all human capital strategies and organizational development initiatives. Overseeing talent acquisition, employee relations, and compensation and benefits, Tam cultivates a high-performance culture aligned with the company's investment servicing mission. This position is pivotal in attracting, retaining, and developing the skilled workforce essential for serving institutional clients. By fostering an inclusive and engaging work environment, Maple Tam ensures that CIBC Mellon's employees are equipped to deliver exceptional service and drive innovation. The Chief Human Resources Officer's strategic focus includes workforce planning, leadership development, and ensuring compliance with labor laws across all operational regions.

    Mike Plantinga - Head of Technology Enterprise Security Chief Technology Officer & Chief Information Security Officer

    Mike Plantinga, the Head of Technology Enterprise Security Chief Technology Officer & Chief Information Security Officer at CIBC Mellon, architects and safeguards the company's technological infrastructure and data security. Overseeing all aspects of IT operations, cybersecurity, and technology strategy, Plantinga ensures the resilience and integrity of systems supporting investment servicing for institutional clients. This multifaceted role is crucial for protecting sensitive financial data and maintaining operational continuity. By implementing advanced security protocols and driving technological innovation, Mike Plantinga enables CIBC Mellon to operate securely and efficiently across its Canadian and international engagements. The Chief Technology Officer & Chief Information Security Officer's leadership ensures robust digital defenses and forward-thinking technology solutions.
    Mike Plantinga

    Catherine Thrasher - Chief Operations Officer

    Catherine Thrasher, the Chief Operations Officer at CIBC Mellon, directs the company's day-to-day operational activities and service delivery. Overseeing client onboarding, transaction processing, and operational efficiency, Thrasher ensures the seamless execution of investment servicing for institutional clients in Canada and globally. This role is fundamental to maintaining high standards of service quality and operational excellence. By streamlining processes and implementing best practices, Catherine Thrasher enhances the client experience and supports the company's strategic growth objectives. The Chief Operations Officer's focus includes managing operational risks, optimizing resource utilization, and driving continuous improvement across all service functions, reinforcing CIBC Mellon's reputation for reliability.
    Catherine Thrasher

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    Frequently Asked Questions Regarding CIBC Mellon Top Executives and Leadership Team

    Who leads CIBC Mellon?
    CIBC Mellon is led by Mal Cullen (Chief Executive Officer), along with executives such as John Riviere (Chief Financial Officer) and Maple Tam (Chief Human Resources Officer).
    Who is part of CIBC Mellon’s executive team?
    The executive team of CIBC Mellon includes leaders such as Mal Cullen (Chief Executive Officer), John Riviere (Chief Financial Officer), Maple Tam (Chief Human Resources Officer) and other senior executives.
    How many executives does CIBC Mellon have?
    CIBC Mellon has 5 executives leading key business areas.
    What roles are included in CIBC Mellon’s leadership team?
    The leadership team of CIBC Mellon includes roles such as Chief Executive Officer, Chief Financial Officer, Chief Human Resources Officer, Head of Technology Enterprise Security Chief Technology Officer & Chief Information Security Officer, Chief Operations Officer.