CIBC Mellon Executive and Leadership Team

August, 2026

Leadership Overview

CIBC Mellon has 5 executives leading key functions including strategy, financial oversight, human capital management, technology security, and operational excellence.

Focused on delivering specialized investment servicing for institutional clients, CIBC Mellon maintains a commitment to operational precision and market-leading financial solutions for investors across the Canadian landscape.

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 overarching strategic vision for the organization. Overseeing the alignment of investment servicing capabilities with the complex needs of institutional clients, the Chief Executive Officer ensures long-term growth and market stability. Mal Cullen manages the executive team to maintain high standards of service delivery across the Canadian financial sector. By fostering strong relationships with key stakeholders and regulatory bodies, the Chief Executive Officer drives the firm toward sustainable performance goals. This leadership role involves constant evaluation of market trends to adapt service offerings for international and domestic investors. Through rigorous oversight of corporate governance and risk management frameworks, the Chief Executive Officer secures the firm's reputation as a trusted partner. Ultimately, Cullen maintains the competitive edge necessary to navigate the evolving landscape of institutional finance while upholding the core values of the organization.

    John Riviere - Chief Financial Officer

    John Riviere, the Chief Financial Officer at CIBC Mellon, manages the financial health and fiscal integrity of the firm. Overseeing capital allocation, financial reporting, and budgetary planning, the Chief Financial Officer ensures the organization maintains robust liquidity to support investment servicing operations. John Riviere directs the financial strategy to optimize resource distribution across all departments, facilitating efficient service delivery for institutional clients. By analyzing complex market data and economic indicators, the Chief Financial Officer provides critical insights that inform board-level decision-making. This leadership role involves maintaining strict compliance with financial regulations while driving initiatives that enhance profitability and operational efficiency. Through the implementation of advanced financial modeling and reporting systems, Riviere strengthens the fiscal foundation of the company. Ultimately, the Chief Financial Officer secures the financial stability required to sustain long-term growth within the competitive Canadian investment servicing market.
    John Riviere

    Maple Tam - Chief Human Resources Officer

    Maple Tam, the Chief Human Resources Officer at CIBC Mellon, directs the talent acquisition, organizational development, and employee engagement strategies. Overseeing the cultivation of a high-performance culture, the Chief Human Resources Officer ensures the workforce possesses the specialized skills required for complex investment servicing tasks. Maple Tam manages the integration of human capital initiatives with broader corporate objectives to drive productivity and innovation. By implementing comprehensive training programs and leadership development frameworks, the Chief Human Resources Officer supports the professional growth of the entire staff. This leadership role involves managing compensation structures and benefits packages to attract top-tier talent in the financial services industry. Through the promotion of diversity, equity, and inclusion, Tam fosters an environment conducive to collaborative success. Ultimately, the Chief Human Resources Officer secures the human capital necessary to maintain the firm's operational excellence and client-focused service model.

    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 the digital infrastructure and cybersecurity defenses. Overseeing the protection of sensitive institutional data, the Head of Technology Enterprise Security Chief Technology Officer & Chief Information Security Officer ensures the resilience of all technological platforms against emerging threats. Mike Plantinga directs the implementation of scalable cloud solutions and advanced security protocols to support seamless investment servicing. By managing the intersection of technology innovation and risk mitigation, the Head of Technology Enterprise Security Chief Technology Officer & Chief Information Security Officer drives the digital transformation of the firm. This leadership role involves coordinating with other executives to align technical capabilities with business requirements. Through the continuous monitoring of global security trends, Plantinga secures the integrity of the firm's digital assets. Ultimately, the Head of Technology Enterprise Security Chief Technology Officer & Chief Information Security Officer maintains the technological superiority required for modern financial operations.
    Mike Plantinga

    Catherine Thrasher - Chief Operations Officer

    Catherine Thrasher, the Chief Operations Officer at CIBC Mellon, directs the daily execution of investment servicing processes and client support functions. Overseeing the operational workflows that facilitate asset custody and fund administration, the Chief Operations Officer ensures accuracy and timeliness for institutional investors. Catherine Thrasher manages the integration of service delivery models to optimize efficiency across the entire operational spectrum. By streamlining internal procedures and implementing process improvements, the Chief Operations Officer drives the firm's ability to handle high-volume transactions with precision. This leadership role involves collaborating with technology and finance teams to ensure operational readiness for new market demands. Through the rigorous application of quality control standards, Thrasher maintains the reliability of the firm's service offerings. Ultimately, the Chief Operations Officer secures the operational consistency required to meet the complex needs of international and domestic clients operating within the Canadian financial landscape.
    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.