Guidewire Software Executive and Leadership Team

June, 2026

Leadership Overview

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

Driven by innovation, Guidewire Software provides cloud-based solutions for property and casualty insurers, modernizing operations and supporting growth across 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, directs strategic planning and execution for enterprise operations. Managing the alignment of business objectives with operational capabilities, Bashar ensures the effective delivery of Guidewire's software solutions. This critical role involves defining and implementing strategies that enhance efficiency and support company growth. By translating executive vision into actionable operational plans, Colleen Bashar directly impacts the company's ability to serve property and casualty insurers. Ultimately, Bashar drives strategic initiatives that solidify Guidewire's market leadership.

    John Mullen - President

    John Mullen, the President at Guidewire Software, directs overarching business strategy and operational execution. Overseeing key divisions, Mullen ensures the seamless integration of policy administration, claims, and billing systems for property and casualty insurers. This leadership role involves driving growth and enhancing decision-making capabilities across the insurance lifecycle. By fostering strategic partnerships and market expansion, John Mullen directly supports Guidewire's mission to modernize the industry. Ultimately, Mullen guides the company's trajectory, ensuring sustained innovation and client success in the competitive software landscape.
    John Mullen

    Michael Dever - President

    Michael Dever, the President at Guidewire Software, drives strategic initiatives and operational performance. Overseeing critical business functions, Dever ensures the effective delivery of cloud-based software for property and casualty insurers, enhancing policy administration, claims, and billing processes. This leadership position focuses on supporting insurer growth and improving decision-making across the insurance lifecycle. By championing innovation and operational efficiency, Michael Dever directly contributes to Guidewire's market leadership. Ultimately, Dever guides the company's strategic direction, reinforcing its commitment to modernizing 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 solidifies Guidewire's market position 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 the execution of high-impact strategic programs, Miles ensures seamless collaboration between departments. This role involves translating company-wide objectives into actionable plans for operational efficiency and market expansion. By coordinating global initiatives, Christina Miles directly supports the company's mission to modernize insurance operations. Ultimately, Miles drives the successful implementation of Guidewire's long-term vision through meticulous project 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, orchestrates product innovation and operational excellence. Overseeing the integration of development pipelines and operational workflows, Ruiz ensures efficient delivery of cloud-based insurance software. This leadership position involves enhancing decision-making processes and supporting growth across the insurance lifecycle. By streamlining product development, David Ruiz directly contributes to Guidewire's ability to meet evolving market demands. Ultimately, Ruiz drives the continuous improvement of Guidewire's platform through strategic operational management.

    Brigette McInnis-Day - Chief People Officer

    Brigette McInnis-Day, the Chief People Officer at Guidewire Software, leads all human capital strategies and organizational development. Overseeing talent acquisition, employee engagement, and culture initiatives, McInnis-Day ensures a high-performing workforce aligned with company goals. This role is pivotal in fostering an environment that supports innovation and growth within the property and casualty insurance software sector. By cultivating a strong employee base, Brigette McInnis-Day directly contributes to Guidewire's operational resilience and market responsiveness. Ultimately, McInnis-Day drives the people-centric strategies essential for Guidewire's sustained success and expansion.
    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 corporate administration. Overseeing compliance, risk management, and corporate governance, King ensures adherence to regulatory standards across Guidewire's operations. This role is crucial for maintaining the integrity of the company's cloud-based software solutions for insurers. By providing expert legal counsel and strategic administrative oversight, James King directly supports Guidewire's commitment to operational excellence and client trust. Ultimately, King safeguards the company's interests and facilitates its growth through robust legal and administrative frameworks.
    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.