Guidewire Software Executive and Leadership Team

August, 2026

Leadership Overview

Guidewire Software has 7 executives leading key functions including marketing, strategic initiatives, product development, enterprise operations, human resources, corporate leadership, and legal administration.

Focused on modernizing the insurance lifecycle, Guidewire Software delivers cloud-based platforms that empower property and casualty insurers to optimize policy administration, claims, billing, and digital customer experiences globally.

Leadership Roles at Guidewire Software

  • Senior Vice President, Enterprise Business Operations. Chief of Staff To Chief Executive Officer. Define and Deliver Strategy - Colleen Bashar
  • President - John Mullen
  • Chief Marketing Officer - Brian Desmond
  • Global Strategic Initiatives Chief of Staff - Christina Miles
  • Vice President and Chief of Staff - Product Development and Operations - David Ruiz
  • Chief People Officer - Brigette McInnis-Day
  • Chief Administrative Officer & General Counsel - Winston King
  • Colleen Bashar - Senior Vice President, Enterprise Business Operations. Chief of Staff To Chief Executive Officer. Define and Deliver Strategy

    Colleen Bashar, the Senior Vice President, Enterprise Business Operations. Chief of Staff To Chief Executive Officer. Define and Deliver Strategy at Guidewire Software, architects the operational infrastructure necessary to execute corporate strategy. Bashar aligns enterprise-wide business functions with the overarching goal of transforming the insurance industry through cloud-based technology. By managing the execution of strategic priorities, the Senior Vice President, Enterprise Business Operations. Chief of Staff To Chief Executive Officer. Define and Deliver Strategy ensures that all departments contribute effectively to the modernization of policy, billing, and claims operations. Colleen Bashar facilitates high-level decision-making by providing the Chief Executive Officer with actionable insights and operational data. This role involves driving organizational change and fostering collaboration across global teams to support sustainable growth. Through the implementation of rigorous performance standards, Bashar optimizes business processes, ensuring the company delivers consistent value to property and casualty insurers while maintaining operational excellence across all market segments.

    John Mullen - President

    John Mullen, the President at Guidewire Software, oversees the execution of the corporate vision and the delivery of cloud-based solutions to the global insurance market. Mullen directs the operational strategy for policy administration, claims, and billing platforms, ensuring these tools meet the complex needs of property and casualty insurers. By managing the integration of analytics and digital customer experiences, the President drives the modernization of the insurance lifecycle. John Mullen collaborates with the Board and executive leadership to define long-term growth objectives and market expansion strategies. This leadership role involves monitoring the performance of core business units to ensure alignment with the mission of the company. Through the oversight of global operations, Mullen ensures that the firm maintains its competitive advantage and delivers consistent value to clients. The President fosters a culture of innovation and operational excellence, positioning the organization as a critical partner for insurers seeking to improve decision-making and support growth.
    John Mullen

    Brian Desmond - Chief Marketing Officer

    Brian Desmond, the Chief Marketing Officer at Guidewire Software, directs global brand positioning and market engagement strategies for the cloud-based insurance platform. Desmond architects comprehensive demand generation programs that highlight the value of policy administration, billing, and claims management software to property and casualty insurers. By aligning marketing initiatives with the evolving needs of the insurance sector, the Chief Marketing Officer drives brand awareness across North American and international markets. This leadership role involves close collaboration with product teams to ensure messaging reflects the latest innovations in underwriting and analytics. Brian Desmond monitors market trends to refine communication strategies, ensuring the company maintains a competitive edge. Through data-driven campaigns and strategic partnerships, the Chief Marketing Officer expands the reach of the platform, ultimately supporting the growth objectives of the organization while reinforcing the reputation of the firm as a leader in insurance technology.
    Brian Desmond

    Christina Miles - Global Strategic Initiatives Chief of Staff

    Christina Miles, the Global Strategic Initiatives Chief of Staff at Guidewire Software, coordinates cross-functional efforts to execute high-priority business objectives across the organization. Miles manages the alignment of strategic projects with the core mission of providing advanced cloud-based software for property and casualty insurers. Overseeing the integration of complex initiatives, the Global Strategic Initiatives Chief of Staff ensures that product development, billing, and underwriting solutions remain synchronized with long-term corporate goals. Christina Miles facilitates communication between executive leadership and operational teams to streamline decision-making processes. By identifying operational bottlenecks and implementing scalable solutions, the Global Strategic Initiatives Chief of Staff enhances organizational efficiency. This role requires constant monitoring of market shifts to adjust strategic priorities, ensuring the company remains agile in a competitive landscape. Through rigorous project oversight and stakeholder management, Miles secures the successful delivery of critical business outcomes that support the modernization of the insurance lifecycle.

    David Ruiz - Vice President and Chief of Staff - Product Development and Operations

    David Ruiz, the Vice President and Chief of Staff - Product Development and Operations at Guidewire Software, oversees the operational framework supporting the creation and deployment of insurance software solutions. Ruiz manages the intersection of product development cycles and daily business operations to ensure the timely delivery of policy administration and analytics tools. By optimizing internal workflows, the Vice President and Chief of Staff - Product Development and Operations drives productivity across engineering and service teams. David Ruiz coordinates with other C-suite leaders to align product roadmaps with the broader strategic vision of the company. This leadership role involves managing resource allocation to support the development of cloud-based platforms that improve underwriting and claims processing for insurers. Through meticulous oversight of operational metrics, Ruiz ensures that product development remains focused on delivering high-value customer experiences. The Vice President and Chief of Staff - Product Development and Operations maintains the technical integrity and operational excellence required to sustain the market position of the firm.

    Brigette McInnis-Day - Chief People Officer

    Brigette McInnis-Day, the Chief People Officer at Guidewire Software, directs the human capital strategy to attract and retain top talent capable of advancing insurance technology. McInnis-Day architects programs focused on professional development, organizational culture, and employee engagement to support the mission of providing innovative software for property and casualty insurers. By aligning workforce capabilities with the strategic needs of the business, the Chief People Officer ensures the company maintains the expertise required to manage complex policy, billing, and claims systems. Brigette McInnis-Day oversees global talent initiatives that foster a high-performance environment across all regional operations. This leadership role involves collaborating with the executive team to build a diverse and inclusive workplace that drives innovation. Through the implementation of modern HR practices, the Chief People Officer supports the long-term growth and operational success of the firm, ensuring that the workforce remains prepared to meet the evolving demands of the insurance industry.
    Brigette McInnis-Day

    Winston King - Chief Administrative Officer & General Counsel

    Winston King, the Chief Administrative Officer & General Counsel at Guidewire Software, manages the legal, compliance, and administrative functions that support the global operations of the firm. King architects the legal framework necessary for the deployment of cloud-based software, ensuring that policy, billing, and underwriting solutions adhere to international regulatory standards. By overseeing corporate governance and risk management, the Chief Administrative Officer & General Counsel protects the interests of the company while enabling business agility. Winston King collaborates with executive leadership to navigate complex legal landscapes and support strategic initiatives. This leadership role involves managing administrative processes that enhance organizational efficiency and ensure the stability of the business. Through the provision of expert legal counsel, King facilitates the expansion of the platform into new markets. The Chief Administrative Officer & General Counsel maintains the integrity of corporate operations, ensuring that the firm continues to provide secure and reliable technology to property and casualty insurers.
    Winston King

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    Frequently Asked Questions Regarding Guidewire Software Top Executives and Leadership Team

    Who leads Guidewire Software?
    Guidewire Software is led by Colleen Bashar (Senior Vice President, Enterprise Business Operations. Chief of Staff To Chief Executive Officer. Define and Deliver Strategy), along with executives such as John Mullen (President) and Brian Desmond (Chief Marketing Officer).
    Who is part of Guidewire Software’s executive team?
    The executive team of Guidewire Software includes leaders such as Colleen Bashar (Senior Vice President, Enterprise Business Operations. Chief of Staff To Chief Executive Officer. Define and Deliver Strategy), John Mullen (President), Brian Desmond (Chief Marketing Officer) and other senior executives.
    How many executives does Guidewire Software have?
    Guidewire Software has 7 executives leading key business areas.
    What roles are included in Guidewire Software’s leadership team?
    The leadership team of Guidewire Software includes roles such as Senior Vice President, Enterprise Business Operations. Chief of Staff To Chief Executive Officer. Define and Deliver Strategy, President, Chief Marketing Officer, Global Strategic Initiatives Chief of Staff, Vice President and Chief of Staff - Product Development and Operations.