Marsh Executive and Leadership Team

October, 2026

Leadership Overview

Marsh has 10 executives leading key functions including regional strategy, risk advisory, and financial operations.

Focused on delivering comprehensive risk management solutions, Marsh empowers commercial and individual clients to navigate complex insurance landscapes through data-driven insights and specialized brokerage expertise.

Leadership Roles at Marsh

  • Chief Executive Officer & President (Chile) - Ernesto Diaz
  • Chief Executive Officer Marsh & President, Marsh Risk (Peru) - Nicolás González
  • Chief Executive Officer (Turkey, Eastern Mediterranean & Caspian Region) - Tarik Serpil
  • Chief Financial Officer - Jaclyn Mascarenhas
  • Managing Director - Robin Reyes
  • Managing Director - Michael Kolodner
  • Managing Director - Marc Major
  • Managing Director - Kirk Moyer
  • Managing Director - Lisa Bastick
  • Managing Director - Mun Ho
  • Ernesto Diaz - Chief Executive Officer & President (Chile)

    Ernesto Diaz, the Chief Executive Officer & President (Chile) at Marsh, directs all regional insurance brokerage and risk advisory operations. Diaz oversees the implementation of local market strategies designed to help commercial clients assess and manage complex risk exposures. By leveraging advanced data analytics and claims advocacy services, the Chief Executive Officer & President (Chile) ensures that regional clients optimize insurance placement while reducing total cost of risk. This leadership role involves coordinating with global teams to maintain high standards of service delivery across the Chilean market. Ernesto Diaz drives growth by identifying emerging industry trends and aligning local resources with the broader corporate mission. Through consistent engagement with regulatory bodies and industry partners, the Chief Executive Officer & President (Chile) secures a competitive position for the firm, ultimately fostering long-term stability and resilience for the diverse client base served within this specific geographic territory.
    Ernesto Diaz

    Nicolás González - Chief Executive Officer Marsh & President, Marsh Risk (Peru)

    Nicolás González, the Chief Executive Officer Marsh & President, Marsh Risk (Peru) at Marsh, manages the strategic direction of risk advisory and insurance placement services throughout the Peruvian market. González architects comprehensive risk management frameworks that assist commercial entities in navigating regulatory requirements and coverage complexities. By integrating technology-driven solutions with deep local market expertise, the Chief Executive Officer Marsh & President, Marsh Risk (Peru) enhances the firm's ability to provide tailored claims advocacy. This position requires constant collaboration with regional stakeholders to ensure that service offerings remain aligned with evolving industry demands. Nicolás González drives operational excellence by optimizing internal processes and expanding the reach of specialized brokerage services. The Chief Executive Officer Marsh & President, Marsh Risk (Peru) maintains a focus on delivering measurable value to clients, ensuring that risk outcomes improve through proactive assessment and strategic insurance management across the entire regional portfolio.

    Tarik Serpil - Chief Executive Officer (Turkey, Eastern Mediterranean & Caspian Region)

    Tarik Serpil, the Chief Executive Officer (Turkey, Eastern Mediterranean & Caspian Region) at Marsh, manages the regional operations of the firm's insurance brokerage and risk advisory business. Serpil architects regional growth strategies that help commercial clients navigate complex regulatory environments and diverse risk landscapes. By overseeing the application of local market expertise and global resources, the Chief Executive Officer (Turkey, Eastern Mediterranean & Caspian Region) ensures that clients receive tailored insurance solutions that reduce total cost of risk. This role involves leading teams to provide expert claims advocacy and strategic consulting across multiple jurisdictions. Tarik Serpil drives business performance by fostering strong relationships with regional partners and industry leaders. The Chief Executive Officer (Turkey, Eastern Mediterranean & Caspian Region) maintains a focus on service quality, ensuring that all brokerage activities align with the firm's commitment to excellence. Through strategic leadership, Tarik Serpil supports the firm's mission, positioning the Chief Executive Officer (Turkey, Eastern Mediterranean & Caspian Region) as a vital contributor to the firm's success in this critical geographic area.

    Jaclyn Mascarenhas - Chief Financial Officer

    Jaclyn Mascarenhas, the Chief Financial Officer at Marsh, directs the financial strategy and fiscal operations of the organization. Mascarenhas oversees the budgeting, financial reporting, and capital allocation processes that support the firm's global brokerage and advisory activities. By analyzing financial performance data, the Chief Financial Officer ensures that resources are deployed efficiently to drive growth and maintain profitability. This leadership role involves collaborating with the executive team to align financial goals with the firm's long-term strategic objectives. Jaclyn Mascarenhas drives operational efficiency by implementing robust financial controls and optimizing cost structures across all business units. The Chief Financial Officer maintains a focus on transparency and compliance, ensuring that all financial activities adhere to regulatory standards. Through rigorous financial oversight, Jaclyn Mascarenhas supports the firm's mission to provide superior risk management services, ensuring that the Chief Financial Officer remains a key contributor to the overall financial health and stability of the organization.
    Jaclyn Mascarenhas

    Robin Reyes - Managing Director

    Robin Reyes, the Managing Director at Marsh, directs specialized brokerage initiatives focused on high-value commercial accounts. Reyes oversees the development of complex insurance programs that address unique risk profiles within the industrial sector. By utilizing proprietary data and analytics, the Managing Director ensures that clients receive precise coverage solutions tailored to specific operational needs. This role involves leading cross-functional teams to execute claims advocacy strategies that minimize financial impact during loss events. Robin Reyes drives business development by cultivating relationships with key market underwriters and industry leaders. The Managing Director maintains a rigorous focus on service quality, ensuring that all brokerage activities align with the firm's commitment to risk reduction. Through the application of deep technical knowledge, the Managing Director supports the broader organizational goal of providing superior advisory services, ultimately strengthening the firm's market presence and enhancing the overall value proposition for commercial clients across the region.

    Michael Kolodner - Managing Director

    Michael Kolodner, the Managing Director at Marsh, manages the strategic deployment of risk advisory services for large-scale enterprise clients. Kolodner architects innovative insurance structures that mitigate systemic risks and improve long-term financial outcomes. By overseeing the integration of technology and market intelligence, the Managing Director ensures that clients navigate regulatory hurdles with confidence. This leadership role involves coordinating with global practice groups to deliver consistent, high-quality brokerage support. Michael Kolodner drives efficiency by streamlining the claims advocacy process and enhancing the speed of insurance placement. The Managing Director maintains a focus on identifying emerging risk trends, allowing the firm to provide proactive guidance to commercial partners. Through the application of advanced analytical tools, Michael Kolodner supports the firm's mission to reduce total cost of risk, ensuring that the Managing Director remains a central figure in the delivery of sophisticated risk management solutions for complex global organizations.

    Marc Major - Managing Director

    Marc Major, the Managing Director at Marsh, directs the expansion of specialized risk consulting services within the financial services sector. Major oversees the assessment of complex risk exposures, ensuring that clients receive robust coverage strategies that align with current market conditions. By leveraging deep industry expertise, the Managing Director facilitates the placement of insurance programs that address both traditional and emerging threats. This role involves leading teams of consultants to provide actionable insights that improve overall risk outcomes for commercial entities. Marc Major drives growth by identifying new market opportunities and strengthening existing client relationships through consistent, high-value advisory support. The Managing Director maintains a focus on operational excellence, ensuring that all consulting engagements adhere to the firm's rigorous standards. Through strategic planning and execution, Marc Major supports the firm's broader objectives, positioning the Managing Director as a key contributor to the success of the regional risk advisory practice.

    Kirk Moyer - Managing Director

    Kirk Moyer, the Managing Director at Marsh, manages the delivery of comprehensive insurance brokerage services for the energy and infrastructure sectors. Moyer architects risk management programs that address the unique challenges of large-scale capital projects and operational assets. By overseeing the application of data-driven insights, the Managing Director ensures that clients optimize their insurance placement to achieve maximum protection at a reduced cost. This role involves collaborating with global underwriting markets to secure favorable terms for complex risks. Kirk Moyer drives business performance by leading teams that provide expert claims advocacy and regulatory guidance. The Managing Director maintains a focus on long-term client retention by delivering consistent, high-quality service that addresses evolving risk landscapes. Through the application of deep industry knowledge, Kirk Moyer supports the firm's mission to provide superior risk advisory, ensuring that the Managing Director remains instrumental in the success of the firm's energy-focused brokerage operations.

    Lisa Bastick - Managing Director

    Lisa Bastick, the Managing Director at Marsh, directs the strategic management of client portfolios within the healthcare and life sciences sectors. Bastick oversees the development of specialized insurance solutions that address the unique regulatory and liability risks inherent in these industries. By utilizing advanced analytics, the Managing Director ensures that clients receive tailored coverage that supports operational continuity and financial stability. This role involves leading cross-functional teams to provide expert claims advocacy and risk consulting services. Lisa Bastick drives growth by identifying emerging market trends and aligning the firm's resources to meet the evolving needs of commercial clients. The Managing Director maintains a focus on service excellence, ensuring that all brokerage activities contribute to the firm's reputation for reliability and expertise. Through strategic leadership, Lisa Bastick supports the broader organizational goals, positioning the Managing Director as a vital contributor to the firm's success in the healthcare risk advisory space.

    Mun Ho - Managing Director

    Mun Ho, the Managing Director at Marsh, manages the strategic direction of brokerage services for the technology and telecommunications sectors. Ho architects risk management frameworks that address the rapid pace of innovation and the associated cyber and operational risks. By overseeing the integration of data-driven insights, the Managing Director ensures that clients optimize their insurance placement to protect critical digital assets. This role involves leading teams to provide expert claims advocacy and regulatory guidance in a highly dynamic market. Mun Ho drives business development by cultivating relationships with key industry stakeholders and expanding the firm's footprint in the technology space. The Managing Director maintains a focus on delivering measurable value, ensuring that all brokerage activities align with the firm's commitment to risk reduction. Through the application of deep technical knowledge, Mun Ho supports the firm's mission to provide superior advisory services, ensuring that the Managing Director remains a central figure in the firm's technology-focused brokerage operations.

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    Frequently Asked Questions Regarding Marsh Top Executives and Leadership Team

    Who leads Marsh?
    Marsh is led by Ernesto Diaz (Chief Executive Officer & President (Chile)), along with executives such as Nicolás González (Chief Executive Officer Marsh & President, Marsh Risk (Peru)) and Tarik Serpil (Chief Executive Officer (Turkey, Eastern Mediterranean & Caspian Region)).
    Who is part of Marsh’s executive team?
    The executive team of Marsh includes leaders such as Ernesto Diaz (Chief Executive Officer & President (Chile)), Nicolás González (Chief Executive Officer Marsh & President, Marsh Risk (Peru)), Tarik Serpil (Chief Executive Officer (Turkey, Eastern Mediterranean & Caspian Region)) and other senior executives.
    How many executives does Marsh have?
    Marsh has 10 executives leading key business areas.
    What roles are included in Marsh’s leadership team?
    The leadership team of Marsh includes roles such as Chief Executive Officer & President (Chile), Chief Executive Officer Marsh & President, Marsh Risk (Peru), Chief Executive Officer (Turkey, Eastern Mediterranean & Caspian Region), Chief Financial Officer, Managing Director.