Guidewire Software Executive and Leadership Team

May, 2026

Leadership Overview

Guidewire Software has 8 executives leading key functions including marketing, strategy, product development, operations, people, legal, and administration.

Driven by innovation, Guidewire Software is dedicated to empowering property and casualty insurers with cloud-based solutions that modernize operations, enhance decision-making, and foster growth throughout the entire insurance lifecycle.

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
  • President - Michael Dever
  • 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 - James 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, drives strategic execution and operational excellence. Directly supporting the Chief Executive Officer, Bashar translates high-level strategy into actionable plans for enterprise business operations. This leadership role involves defining and delivering key initiatives that enhance Guidewire's market position and operational capabilities. By ensuring strategic alignment across departments, Colleen Bashar directly impacts the company's ability to support growth and modernize insurer operations. Ultimately, Bashar champions the delivery of impactful strategies that advance Guidewire's mission.

    John Mullen - President

    John Mullen, the President at Guidewire Software, drives strategic direction and operational oversight across key business units. Leading significant aspects of the company's growth initiatives, Mullen ensures alignment with Guidewire's mission to transform the P&C insurance industry. This executive role involves fostering strong relationships with clients and partners, enhancing market penetration, and championing innovation in cloud-based insurance software. By guiding critical business functions, John Mullen directly contributes to the company's ability to deliver advanced solutions for policy administration, claims, and billing. Ultimately, Mullen plays a pivotal role in advancing Guidewire's market leadership and supporting insurer modernization efforts.
    John Mullen

    Michael Dever - President

    Michael Dever, the President at Guidewire Software, directs strategic planning and execution for critical business segments. Overseeing major operational areas, Dever ensures the effective delivery of Guidewire's comprehensive software suite to property and casualty insurers. This leadership position involves driving initiatives that enhance customer value and expand market presence within the insurance technology landscape. By focusing on operational excellence and strategic growth, Michael Dever directly supports the company's objective of modernizing insurance operations and improving decision-making capabilities. Ultimately, Dever contributes significantly to Guidewire's sustained success and its role in shaping the future of the insurance industry.
    Michael Dever

    Brian Desmond - Chief Marketing Officer

    Brian Desmond, the Chief Marketing Officer at Guidewire Software, directs all global marketing initiatives. Overseeing brand strategy and demand generation, Desmond ensures alignment with corporate objectives for expanding market reach. This leadership role involves driving awareness for Guidewire's cloud-based software solutions tailored for property and casualty insurers. By optimizing marketing campaigns, Brian Desmond directly impacts lead generation and customer acquisition. Ultimately, Desmond secures sustained market presence and supports the company's growth trajectory through impactful communication strategies.
    Brian Desmond

    Christina Miles - Global Strategic Initiatives Chief of Staff

    Christina Miles, the Global Strategic Initiatives Chief of Staff at Guidewire Software, spearheads critical cross-functional projects. Managing strategic planning and execution, Miles ensures seamless integration of new initiatives across departments. This leadership role involves coordinating efforts to advance Guidewire's mission of modernizing insurance operations. By facilitating communication and driving project momentum, Christina Miles directly contributes to the successful implementation of key business strategies. Ultimately, Miles enhances operational efficiency and supports the company's long-term vision through focused strategic oversight.

    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 critical operational functions. Managing product development pipelines and operational efficiency, Ruiz ensures seamless delivery of Guidewire's cloud-based solutions. This leadership role involves aligning product roadmaps with market demands and optimizing internal processes for insurers. By fostering collaboration between development and operations teams, David Ruiz directly enhances the quality and speed of software deployment. Ultimately, Ruiz supports the company's commitment to improving decisions and driving growth across the insurance lifecycle.

    Brigette McInnis-Day - Chief People Officer

    Brigette McInnis-Day, the Chief People Officer at Guidewire Software, directs all human capital strategies. Overseeing talent acquisition, development, and employee engagement, McInnis-Day ensures a high-performing workforce aligned with company goals. This leadership role involves cultivating a culture that supports innovation and growth within the property and casualty insurance software sector. By fostering a supportive and dynamic work environment, Brigette McInnis-Day directly contributes to Guidewire's ability to attract and retain top talent. Ultimately, McInnis-Day strengthens the organization's foundation, enabling the company to effectively serve its clients and achieve its strategic objectives.
    Brigette McInnis-Day

    James King - Chief Administrative Officer & General Counsel

    James King, the Chief Administrative Officer & General Counsel at Guidewire Software, manages legal affairs and administrative functions. Overseeing corporate governance and compliance, King ensures adherence to all regulatory requirements and ethical standards. This leadership role involves providing strategic legal counsel and managing administrative operations that support Guidewire's global business. By safeguarding the company's legal interests and optimizing administrative processes, James King directly contributes to operational stability and risk mitigation. Ultimately, King ensures a robust legal framework and efficient administrative support, enabling Guidewire to focus on its core mission of serving insurers.
    James 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 Michael Dever (President).
    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), Michael Dever (President) and other senior executives.
    How many executives does Guidewire Software have?
    Guidewire Software has 8 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, President, Chief Marketing Officer, Global Strategic Initiatives Chief of Staff.