Marsh & McLennan Companies Executive and Leadership Team

October, 2026

Leadership Overview

Marsh & McLennan Companies has 10 executives leading key functions including global strategy, regional market expansion, risk advisory, and operational management.

Focused on delivering data-driven insights across risk and people, Marsh & McLennan Companies empowers organizations to navigate complexity through specialized consulting and insurance solutions that build long-term confidence and resilience.

Leadership Roles at Marsh & McLennan Companies

  • Chief Executive Officer - Derek Heng
  • Chief Executive Officer of MMC - Mireya Ribas
  • Chief Executive Officer, Marsh Mclennan Macau (Hong Kong, Taiwan) - Seth Peller
  • Chief Executive Officer Marsh McLennan República Dominicana - Vivian Acra
  • Chief Executive Officer, Marsh Mclennan, , Middle & Africa (India, East) - Renee McGowan
  • Chief Executive Officer, Marsh Mclennan (Qatar) - Asaad Qassas
  • Co-Chief Executive Officer - Sandra Vucurovic
  • Managing Director - Jacqueline Golden
  • Managing Director - Stefanie Boyle
  • Managing Director - Michael Smithes
  • Derek Heng - Chief Executive Officer

    Derek Heng, the Chief Executive Officer at Marsh & McLennan Companies, directs the overarching strategic vision for the firm. This leadership role involves aligning global risk management and consulting services with the evolving needs of multinational corporations. By overseeing the integration of data-driven insights across all business units, the Chief Executive Officer ensures that the firm maintains its competitive edge in over 130 countries. Derek Heng drives the execution of long-term growth initiatives, focusing on the intersection of risk, strategy, and human capital. Through constant collaboration with the Board, the Chief Executive Officer optimizes operational performance and fosters a culture of innovation. This executive leadership position requires balancing complex market demands with the necessity for sustainable financial outcomes. Ultimately, the Chief Executive Officer secures the firm's position as a premier advisor for organizations navigating global volatility and economic uncertainty.
    Derek Heng

    Mireya Ribas - Chief Executive Officer of MMC

    Mireya Ribas, the Chief Executive Officer of MMC at Marsh & McLennan Companies, manages the firm's corporate governance and high-level strategic alignment. This role involves supervising the centralized investments in artificial intelligence and analytics to enhance service delivery across the global enterprise. By coordinating with various business divisions, the Chief Executive Officer of MMC ensures that the firm's advisory services remain at the forefront of industry standards. Mireya Ribas drives the implementation of operational excellence programs designed to streamline internal processes and improve client outcomes. This leadership function requires deep engagement with cross-functional teams to maintain the firm's reputation for excellence in risk and people management. Through rigorous oversight of corporate initiatives, the Chief Executive Officer of MMC supports the firm's mission to provide comprehensive solutions that help clients thrive in complex environments.

    Seth Peller - Chief Executive Officer, Marsh Mclennan Macau (Hong Kong, Taiwan)

    Seth Peller, the Chief Executive Officer, Marsh Mclennan Macau (Hong Kong, Taiwan) at Marsh & McLennan Companies, oversees all regional operations across these critical Asian markets. This leadership role involves tailoring the firm's risk and consulting expertise to meet the specific regulatory and economic requirements of the region. By driving local business development, the Chief Executive Officer, Marsh Mclennan Macau (Hong Kong, Taiwan) ensures that clients receive high-impact advisory services that address unique regional challenges. Seth Peller manages the expansion of insurance broking and risk management capabilities, fostering strong relationships with government entities and multinational corporations. This position requires constant monitoring of market trends to adapt service offerings effectively. Through strategic leadership, the Chief Executive Officer, Marsh Mclennan Macau (Hong Kong, Taiwan) strengthens the firm's footprint and supports the broader organizational goal of delivering consistent, high-quality professional services across diverse international landscapes.

    Vivian Acra - Chief Executive Officer Marsh McLennan República Dominicana

    Vivian Acra, the Chief Executive Officer Marsh McLennan República Dominicana at Marsh & McLennan Companies, leads the firm's strategic initiatives within the Caribbean market. This role involves directing the delivery of comprehensive risk management and insurance broking services to local and multinational clients. By overseeing the regional team, the Chief Executive Officer Marsh McLennan República Dominicana ensures that the firm's global expertise in cybersecurity and business risk analysis translates into actionable local solutions. Vivian Acra drives growth by identifying emerging opportunities in the regional economy and aligning the firm's resources to support client performance. This leadership position requires maintaining high standards of service excellence while navigating the specific complexities of the local business environment. Through proactive engagement with stakeholders, the Chief Executive Officer Marsh McLennan República Dominicana reinforces the firm's commitment to helping organizations build resilience and achieve long-term success.
    Vivian Acra

    Renee McGowan - Chief Executive Officer, Marsh Mclennan, , Middle & Africa (India, East)

    Renee McGowan, the Chief Executive Officer, Marsh Mclennan, , Middle & Africa (India, East) at Marsh & McLennan Companies, manages the firm's extensive operations across these diverse and rapidly growing markets. This leadership role involves architecting strategies that integrate the firm's health, wealth, and career management consulting services with local market needs. By overseeing regional teams, the Chief Executive Officer, Marsh Mclennan, , Middle & Africa (India, East) ensures that clients receive tailored advice that improves retirement outcomes and shapes the future of work. Renee McGowan drives the expansion of the firm's footprint, focusing on delivering data-driven insights that help organizations navigate regional volatility. This position requires balancing global standards with local operational nuances to maintain consistent performance. Through strategic oversight, the Chief Executive Officer, Marsh Mclennan, , Middle & Africa (India, East) supports the firm's mission to provide comprehensive advisory services that empower clients to thrive.

    Asaad Qassas - Chief Executive Officer, Marsh Mclennan (Qatar)

    Asaad Qassas, the Chief Executive Officer, Marsh Mclennan (Qatar) at Marsh & McLennan Companies, directs the firm's advisory and risk management operations within the Qatari market. This role involves providing specialized consulting services that help local entities optimize their business performance and manage complex risks. By overseeing the implementation of global best practices, the Chief Executive Officer, Marsh Mclennan (Qatar) ensures that clients benefit from the firm's deep industry knowledge and analytical modeling capabilities. Asaad Qassas drives the development of insurance programs and capital strategies tailored to the specific needs of the regional economy. This leadership position requires constant interaction with key stakeholders to ensure alignment with the firm's overarching mission. Through strategic focus, the Chief Executive Officer, Marsh Mclennan (Qatar) strengthens the firm's market position and supports the delivery of high-value professional services that foster organizational confidence.
    Asaad Qassas

    Sandra Vucurovic - Co-Chief Executive Officer

    Sandra Vucurovic, the Co-Chief Executive Officer at Marsh & McLennan Companies, shares responsibility for the firm's internal scaling and operational efficiency. This leadership role focuses on the integration of Business and Client Services to accelerate innovation across the organization. By overseeing the centralization of investments in data and artificial intelligence, the Co-Chief Executive Officer ensures that all business units operate with maximum agility. Sandra Vucurovic drives the development of cross-functional frameworks that improve service delivery and client performance. This position requires close collaboration with other C-suite leaders to align operational goals with the firm's long-term strategic vision. Through rigorous management of internal resources, the Co-Chief Executive Officer supports the firm's ability to provide comprehensive advisory services. Ultimately, Vucurovic ensures that the firm maintains its competitive advantage by fostering a culture of continuous improvement and technological advancement.

    Jacqueline Golden - Managing Director

    Jacqueline Golden, the Managing Director at Marsh & McLennan Companies, leads specialized advisory teams focused on risk consulting and insurance program management. This role involves architecting complex risk solutions for multinational corporations and professional service organizations. By overseeing the delivery of cybersecurity consulting and analytical modeling, the Managing Director ensures that clients receive actionable insights to mitigate business threats. Jacqueline Golden drives the development of alternative risk financing strategies that align with the firm's broader mission of building organizational resilience. This leadership position requires deep industry expertise to guide clients through volatile market conditions. Through constant collaboration with other senior leaders, the Managing Director supports the firm's commitment to providing comprehensive, data-driven advice. Ultimately, Golden secures the firm's reputation as a trusted partner for organizations seeking to navigate complexity and achieve sustainable growth in a globalized economy.

    Stefanie Boyle - Managing Director

    Stefanie Boyle, the Managing Director at Marsh & McLennan Companies, oversees the firm's strategic consulting initiatives within the management consulting division. This role involves combining deep industry knowledge with specialized expertise to help clients optimize their business operations and accelerate performance. By directing teams that focus on organizational advisory services, the Managing Director ensures that clients achieve their strategic goals through improved efficiency and structural alignment. Stefanie Boyle drives the implementation of performance-enhancing frameworks that leverage the firm's global data and analytical capabilities. This leadership position requires constant engagement with clients to understand their unique challenges and provide tailored solutions. Through strategic oversight, the Managing Director supports the firm's mission to deliver comprehensive advisory services that help organizations thrive. Ultimately, Boyle contributes to the firm's success by fostering a culture of excellence and innovation in all consulting engagements.

    Michael Smithes - Managing Director

    Michael Smithes, the Managing Director at Marsh & McLennan Companies, manages the firm's reinsurance and capital strategy initiatives. This role involves developing advanced strategies that help clients grow profitably and pursue emerging opportunities in the global insurance market. By overseeing the application of deep industry knowledge, the Managing Director ensures that clients receive sophisticated advice on capital management and risk transfer. Michael Smithes drives the integration of data-driven insights into reinsurance programs, enhancing the firm's ability to provide comprehensive solutions. This leadership position requires close coordination with other business units to ensure that capital strategies align with the firm's overall risk management objectives. Through proactive market engagement, the Managing Director supports the firm's mission to help organizations navigate complexity and build confidence. Ultimately, Smithes secures the firm's position as a leader in providing innovative capital and reinsurance advisory services.

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    Frequently Asked Questions Regarding Marsh & McLennan Companies Top Executives and Leadership Team

    Who leads Marsh & McLennan Companies?
    Marsh & McLennan Companies is led by Derek Heng (Chief Executive Officer), along with executives such as Mireya Ribas (Chief Executive Officer of MMC) and Seth Peller (Chief Executive Officer, Marsh Mclennan Macau (Hong Kong, Taiwan)).
    Who is part of Marsh & McLennan Companies’s executive team?
    The executive team of Marsh & McLennan Companies includes leaders such as Derek Heng (Chief Executive Officer), Mireya Ribas (Chief Executive Officer of MMC), Seth Peller (Chief Executive Officer, Marsh Mclennan Macau (Hong Kong, Taiwan)) and other senior executives.
    How many executives does Marsh & McLennan Companies have?
    Marsh & McLennan Companies has 10 executives leading key business areas.
    What roles are included in Marsh & McLennan Companies’s leadership team?
    The leadership team of Marsh & McLennan Companies includes roles such as Chief Executive Officer, Chief Executive Officer of MMC, Chief Executive Officer, Marsh Mclennan Macau (Hong Kong, Taiwan), Chief Executive Officer Marsh McLennan República Dominicana, Chief Executive Officer, Marsh Mclennan, , Middle & Africa (India, East).