Loomis Sayles Executive and Leadership Team

May, 2026

Leadership Overview

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

Driven by a commitment to client success, Loomis Sayles fulfills the investment needs of institutional and mutual fund clients worldwide, leveraging decades of expertise to deliver superior investment performance and service.

Leadership Roles at Loomis Sayles

  • Chairman & Chief Executive Officer - Kevin Charleston
  • Chief Financial Officer & Board Member - Susan Sieker
  • Chief Operating Officer - John Gidman
  • Chief Information Officer - James Lombardo
  • Chief Technology Officer - Christian Dietz
  • 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 overall strategic vision and operational execution. Charleston guides the company's global expansion and market positioning, ensuring alignment with client objectives and industry best practices. This leadership role involves fostering a culture of innovation and accountability across all departments. Charleston's oversight extends to key financial decisions and long-term growth initiatives, directly impacting Loomis Sayles' standing as a premier investment management firm. The Chairman & Chief Executive Officer drives the company's mission to meet the diverse investment needs of institutional and mutual fund clients worldwide. By setting ambitious goals and championing strategic partnerships, Kevin Charleston solidifies the firm's commitment to delivering exceptional value and sustained performance in the competitive financial landscape.

    Susan Sieker - Chief Financial Officer & Board Member

    Susan Sieker, the Chief Financial Officer & Board Member at Loomis Sayles, manages the company's financial health and strategic fiscal planning. Sieker oversees all financial operations, including accounting, budgeting, forecasting, and capital management, ensuring compliance and fiscal responsibility. This critical role involves providing financial insights to support executive decision-making and board governance. The Chief Financial Officer & Board Member plays a key part in shaping the firm's financial strategy, driving profitability, and optimizing resource allocation. By guiding financial policy, Susan Sieker ensures Loomis Sayles can effectively meet the investment needs of its institutional and mutual fund clients worldwide. Sieker's financial acumen is instrumental in sustaining the company's long-term stability and growth.
    Susan Sieker

    John Gidman - Chief Operating Officer

    John Gidman, the Chief Operating Officer at Loomis Sayles, directs the firm's day-to-day operational activities and process optimization. Gidman ensures the seamless execution of business functions, enhancing efficiency and scalability across the organization. This leadership position is vital for maintaining the high standards of service required by Loomis Sayles' global client base. The Chief Operating Officer oversees critical operational areas, including business process management, service delivery, and risk mitigation, ensuring robust internal controls. By streamlining workflows and implementing best practices, John Gidman supports the company's mission to meet the investment needs of institutional and mutual fund clients worldwide. Gidman's focus on operational excellence underpins the firm's ability to deliver consistent results and maintain client trust.
    John Gidman

    James Lombardo - Chief Information Officer

    James Lombardo, the Chief Information Officer at Loomis Sayles, architects and executes the firm's comprehensive technology strategy. Lombardo oversees the development and implementation of robust IT infrastructure, ensuring data security, system reliability, and operational efficiency across global platforms. This role is critical for supporting Loomis Sayles' investment management operations and client service delivery. The Chief Information Officer drives technological innovation, enabling the firm to leverage advanced analytics and digital tools for enhanced performance and client engagement. By managing the technology roadmap, James Lombardo ensures that the firm remains at the forefront of digital transformation within the finance industry. Lombardo's leadership ensures that technology solutions directly support the company's mission to fulfill the investment needs of institutional and mutual fund clients worldwide.
    James Lombardo

    Christian Dietz - Chief Technology Officer

    Christian Dietz, the Chief Technology Officer at Loomis Sayles, spearheads the company's technological advancements and innovation pipeline. Dietz focuses on developing and integrating cutting-edge technologies that enhance investment strategies and operational capabilities. This role is pivotal in driving digital transformation and ensuring Loomis Sayles maintains a competitive technological edge. The Chief Technology Officer leads research and development initiatives, exploring new platforms and solutions to support the firm's growth and client service objectives. By championing technological innovation, Christian Dietz ensures that Loomis Sayles is equipped to meet the evolving investment needs of its global clientele. Dietz's strategic direction in technology directly supports the company's commitment to delivering superior investment outcomes.
    Christian Dietz

    Debbie Lewis - Chief Human Resources Officer

    Debbie Lewis, the Chief Human Resources Officer at Loomis Sayles, directs the company's human capital strategy and talent management initiatives. Lewis oversees all aspects of HR, including recruitment, employee development, compensation, and fostering a positive organizational culture. This leadership position is essential for attracting, retaining, and developing the skilled workforce required by Loomis Sayles. The Chief Human Resources Officer ensures that HR policies and practices align with the company's strategic goals and support its mission to serve clients effectively. By cultivating a high-performance environment, Debbie Lewis contributes to the firm's ability to meet the diverse investment needs of institutional and mutual fund clients worldwide. Lewis's focus on people development strengthens the foundation for sustained success.

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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 Information Officer, Chief Technology Officer.