Loomis Sayles Executive and Leadership Team

June, 2026

Leadership Overview

Loomis Sayles has 6 executives leading key functions including strategy, technology, operations, information systems, finance, and human resources.

Dedicated to fulfilling global investment needs, Loomis Sayles drives financial solutions for institutional and mutual fund clients, upholding a legacy of investment management excellence since 1926.

Leadership Roles at Loomis Sayles

  • Chairman & Chief Executive Officer - Kevin Charleston
  • Chief Financial Officer & Board Member - Susan Sieker
  • Chief Operating Officer - John Gidman
  • Chief Technology Officer - Christian Dietz
  • Chief Information Officer - James Lombardo
  • Chief Human Resources Officer - Debbie Lewis
  • Kevin Charleston - Chairman & Chief Executive Officer

    Kevin Charleston, the Chairman & Chief Executive Officer at Loomis Sayles, directs the firm's overarching strategy and global operations. Charleston guides the executive team in executing the company's mission to meet the investment needs of institutional and mutual fund clients worldwide. This leadership role involves setting the strategic vision for Loomis Sayles, ensuring alignment with market dynamics and client objectives. The Chairman & Chief Executive Officer oversees all major business units, driving growth and maintaining the firm's commitment to investment management excellence. Charleston's strategic direction ensures the company's continued success and expansion in the global financial landscape. By championing innovation and client-centric approaches, Kevin Charleston solidifies Loomis Sayles' position as a trusted investment partner.

    Susan Sieker - Chief Financial Officer & Board Member

    Susan Sieker, the Chief Financial Officer & Board Member at Loomis Sayles, directs the company's financial strategy, planning, and reporting. Sieker oversees all aspects of financial management, including accounting, treasury, and capital allocation, ensuring the fiscal health and stability of the firm. This executive position involves managing financial risks, optimizing resource allocation, and providing critical financial insights to support strategic decision-making for institutional and mutual fund clients. The Chief Financial Officer & Board Member plays a key part in financial governance and compliance, upholding the highest standards of integrity. By guiding financial operations, Susan Sieker ensures Loomis Sayles maintains its strong market position and commitment to long-term growth. Sieker's financial acumen supports the firm's investment objectives.
    Susan Sieker

    John Gidman - Chief Operating Officer

    John Gidman, the Chief Operating Officer at Loomis Sayles, manages the day-to-day operational functions and business processes that support the firm's global investment activities. Gidman oversees critical areas such as client onboarding, trade execution, and operational risk management, ensuring seamless service delivery to institutional and mutual fund clients worldwide. This leadership position involves optimizing workflows, enhancing operational resilience, and driving efficiency across all departments. The Chief Operating Officer plays a pivotal role in scaling operations to meet evolving market demands and regulatory requirements. By ensuring operational excellence, John Gidman directly contributes to the firm's reputation for reliability and superior client service. Gidman's focus maintains the integrity of Loomis Sayles' investment management framework.
    John Gidman

    Christian Dietz - Chief Technology Officer

    Christian Dietz, the Chief Technology Officer at Loomis Sayles, architects the firm's technology infrastructure and digital transformation initiatives. Dietz oversees the development and implementation of innovative technological solutions that enhance operational efficiency and client service delivery across global markets. This critical role involves managing the technology roadmap, ensuring robust cybersecurity measures, and leveraging data analytics to inform strategic decisions. The Chief Technology Officer drives the integration of cutting-edge technologies to support Loomis Sayles' investment management services for institutional and mutual fund clients. By fostering a culture of technological advancement, Christian Dietz ensures the firm remains at the forefront of the financial industry. Dietz's leadership ensures technology empowers the company's mission.
    Christian Dietz

    James Lombardo - Chief Information Officer

    James Lombardo, the Chief Information Officer at Loomis Sayles, directs the company's information systems strategy and execution. Lombardo oversees the management of all IT infrastructure, data governance, and technology support services essential for the firm's global investment operations. This role is crucial for ensuring the security, integrity, and accessibility of information critical to serving institutional and mutual fund clients. The Chief Information Officer drives initiatives that enhance data management capabilities and support the firm's technological advancements. By ensuring robust and reliable information systems, James Lombardo underpins the firm's ability to deliver exceptional investment management services. Lombardo's oversight guarantees data security and system performance.
    James Lombardo

    Debbie Lewis - Chief Human Resources Officer

    Debbie Lewis, the Chief Human Resources Officer at Loomis Sayles, leads the company's human capital strategy and talent management initiatives. Lewis oversees all HR functions, including recruitment, employee development, compensation, and benefits, fostering a high-performance culture that supports the firm's investment management goals. This role is vital for attracting, retaining, and developing the skilled professionals who serve Loomis Sayles' global client base. The Chief Human Resources Officer ensures HR policies and practices align with the company's mission and values, promoting employee engagement and organizational effectiveness. By championing talent development, Debbie Lewis strengthens the firm's workforce and its capacity to deliver exceptional service to institutional and mutual fund clients. Lewis's focus cultivates a supportive and dynamic work environment.

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    Frequently Asked Questions Regarding Loomis Sayles Top Executives and Leadership Team

    Who leads Loomis Sayles?
    Loomis Sayles is led by Kevin Charleston (Chairman & Chief Executive Officer), along with executives such as Susan Sieker (Chief Financial Officer & Board Member) and John Gidman (Chief Operating Officer).
    Who is part of Loomis Sayles’s executive team?
    The executive team of Loomis Sayles includes leaders such as Kevin Charleston (Chairman & Chief Executive Officer), Susan Sieker (Chief Financial Officer & Board Member), John Gidman (Chief Operating Officer) and other senior executives.
    How many executives does Loomis Sayles have?
    Loomis Sayles has 6 executives leading key business areas.
    What roles are included in Loomis Sayles’s leadership team?
    The leadership team of Loomis Sayles includes roles such as Chairman & Chief Executive Officer, Chief Financial Officer & Board Member, Chief Operating Officer, Chief Technology Officer, Chief Information Officer.