Investor Relations


Board of Directors

Marcus S. Ryu

Marcus Ryu Marcus Ryu has served as Guidewire's Chairman since August 2019, leading the company's Board of Directors, contributing to the company’s strategy, and serving key customer and industry relationships. Since co-founding the company in 2001, Marcus served many roles for the company, including leading the product, marketing, sales, and services teams. Most recently, Marcus served as CEO from 2010 to 2019, leading the company through its IPO in 2012. During his tenure as CEO, Guidewire became the market-leading provider of mission-critical applications to P&C insurers. Before co-founding Guidewire, he was Vice President of Strategy at Ariba and an Engagement Manager at McKinsey & Company. Marcus currently serves on the Board of Directors of Cornerstone on Demand (NASDAQ: CSOD) and the private companies Checkr and Bloomreach. He has an A.B. from Princeton University and a B.Phil. from New College, Oxford University, where he was a Marshall Scholar.

Paul Lavin

Paul Lavin Paul Lavin has served on our board of directors since 2014 and as Lead Independent Director since August 2019. Mr. Lavin serves as Executive Director of both American Health Holding and First Health Network, leading health insurance-related companies and subsidiaries of Aetna, holding those positions since 2008 and 2017, respectively. Prior to joining Aetna, Mr. Lavin was a Managing Director at KPMG Consulting/BearingPoint, where his focus was on financial services, primarily insurance. Mr. Lavin was formerly a Senior Vice President at Prudential, an executive at Alexander & Alexander, a Principal at Mercer Management Consulting, and an auditor at Price Waterhouse, where he was a CPA. He holds both a BS in Economics and an M.B.A. from the University of Pennsylvania’s Wharton School of Business.

Mike Rosenbaum

Mike RosenbaumMike Rosenbaum has served on our board since 2019. Mike serves as Guidewire’s Chief Executive Officer and has overall responsibility for the company’s global strategy, organization, culture, and operations.

Prior to Guidewire, Mike was part of the team at Salesforce for almost 14 years where he held several leadership positions and drove many of Salesforce’s most notable product achievements. Most recently, Mike served as EVP Product, leading the product management and go to market strategy for Salesforce’s core CRM product lines Sales Cloud, Service Cloud and Salesforce’s Platform business, and led the launch of Salesforce Lightning, a next generation user experience framework. Prior to that, Mike led Salesforce’s Platform organization and the AppExchange ecosystem.

Prior to Salesforce, he held various technology and marketing roles at Siebel Systems and spent five years serving in the U.S. Navy as a submarine officer onboard the USS Nevada.

Mike is a graduate of the United States Naval Academy where he earned a bachelor’s degree in Systems Engineering and The Haas School of Business at the University of California Berkeley where he earned an MBA. He is passionate about building great teams and delivering innovative products and platforms that deliver value for customers, partners and shareholders. 

Andrew William Fraser Brown

Andy Brown Andy Brown has served on our board of directors since 2013. Mr. Brown currently serves as CEO of Sand Hill East, LLC, which provides strategic management, investment, and marketing services to emerging companies. Mr. Brown is also a member of the boards of directors of Zscaler, Inc., a publicly traded company providing cloud security services; LMRKTS LLC, a company providing FX and Swaps compression utilities; Moogsoft, a next -generation AI-Operations company; SiteHands, a company providing “field engineering as a service”; and Pure Storage, Inc., a publicly traded software-defined data storage solutions company. He is also CEO and co-owner of Biz Tectonics LLC, a privately held consulting company. From September 2010 to October 2013, Mr. Brown served as Group Chief Technology Officer of UBS, an investment bank. Prior to that, Mr. Brown served in a variety of executive management and leadership roles at a variety of leading banking companies including Bank of America, Merrill Lynch, and Credit Suisse. Mr. Brown holds a BSc Honors Degree in Chemical Physics from University College London.

Margaret Dillon

Margaret DillonMargie Dillon has served on our board since 2019. From December 1993 to September 2017, Ms. Dillon served in various roles at Liberty Mutual Insurance Company, including as Senior Vice President and Chief Financial Officer, Personal Insurance, and as Executive Vice President and Chief Customer Officer, U.S. Consumer Markets. Ms. Dillon holds a B.S. in Computer Science and an M.S. in Finance from Boston College.

Guy Dubois

Guy Dubois has served on our board of directors since 2012. Mr. Dubois currently serves as Chairman of the Board of Access Group, a privately held company and a leading mid-market software solutions provider in the U.K. He is also a member of the board of directors of Ansys Inc., a publicly traded company that develops and globally markets engineering simulation software and technologies widely used by engineers and designers across a broad spectrum of industries. Since 2013, he has served as Chairman of NewVoiceMedia, a privately held UK firm specializing in cloud contact center technology. From 2013 to 2014, he was a Senior Advisor at Silver Lake, a leading private equity technology investor. From July 2011 to July 2012, he held the position of CEO at banking software provider, TEMENOS. From 2009 to 2011, Mr. Dubois served as president and CEO of MACH Group, a hub-based mobile communications exchange solutions provider. From 2007 to 2008, Mr. Dubois was the EVP and president of the global products division of Amdocs. From 2005 to 2007, he was president and CEO of Cramer Systems. Between 2001 and 2005, he was EVP at PeopleSoft, where he led strategy and business development outside North America. Previously, Mr. Dubois held senior positions with Vantive, Sybase and Digital Equipment Corporation. Mr. Dubois graduated with a Master of Science & Business from Lille University as well as being a graduate of the University of Lille Engineering School.

Peter Gassner

Peter Gassner has served on our Board of Directors since 2015 and as Chairman of the board from March 2017 to August 2019. Mr. Gassner founded Veeva Systems Inc. in 2007 and as CEO, is responsible for its overall direction and management. He is a member of Veeva’s board of directors and is a twenty year veteran of the software industry. He is also a member of the board of directors of Zoom Video Communications, a privately held company providing video conferencing services. Prior to founding Veeva, Mr. Gassner was Senior Vice President of Technology at where he had responsibility for building the platform including product, marketing and developer relations. During Mr. Gassner’s tenure, completed its initial public offering and grew the technology into the most successful SaaS platform in the industry. Before, Mr. Gassner was with PeopleSoft for nine years as both Chief Architect and General Manager of PeopleTools. Mr. Gassner led a team of over 450 professionals who provided the development, strategy, marketing and customer support for PeopleSoft’s technology platform. PeopleTools was widely regarded in the industry as the best application platform of its day. Mr. Gassner began his career with IBM in relational database development and research at IBM Silicon Valley Lab and then at IBM Almaden Research Center where he had the privilege of working closely with some of the inventors of relational database technology. Mr. Gassner holds a Bachelor of Science degree in Computer Science from Oregon State University.

Michael Keller

Michael KellerMike Keller has served on our board since 2019. Mr. Keller currently serves as a consultant for MCK Consultants, LLC, an organization which he also owns and serves as principal of, which focuses on technology solutions for the insurance and financial services industries. Since April 2019, he has served as chairman of the Company’s customer Strategic Advisory Councils. From June 2001 to June 2018, Mr. Keller served as the Executive Vice President and Chief Information Officer at Nationwide Insurance and Financial Services, From January 1998 to May 2001, Mr. Keller served as Chief Technology Officer at JPMorgan Chase & Co. (formerly Bank One), a commercial banking and financial services company. Mr. Keller holds a B.S. in Mathematics from the University of Michigan.

Catherine Lego

Catherine LegoCathy Lego has served on our board since 2019. Ms. Lego is currently a member of the board of directors of Cypress Semiconductor Corporation, a publicly traded semiconductor design and manufacturing company, where she serves as the chair of the audit committee and a member of the nominating and corporate governance committee; IPG Photonics Corporation, a publicly traded producer of high-power fiber lasers, where she has been the chair of the compensation committee since 2017 and a member of the audit committee since 2016; and Lam Research Corporation, a publicly traded  wafer fabrication equipment company, where she has been the chair of the compensation committee since 2015 and a member of the nominating and governance committee since 2014, and was chair of the audit committee from 2009 to 2014. From 2013 to 2016, she was a member of the board of directors of Fairchild Semiconductor International Inc., a fabricator of power management devices, where she was a member of the compensation committee and nominating and governance committee. From 1989 to 2002 and 2004 to 2016, she was a member of the board of directors of SanDisk Corporation, a publicly traded global developer of flash memory storage solutions, where she was the chair of the audit committee. From June 1992 to December 2018, Ms. Lego was an angel investor and financial consultant to early stage technology companies via Lego Ventures, LLC, where she served as its principal and owner. She previously practiced as a certified public accountant with Coopers & Lybrand (now PricewaterhouseCoopers). Ms. Lego holds a B.A. in Economics and Biology from Williams College and an M.S. in Accounting from the New York University Stern School of Business.

Clifton Thomas Weatherford

Thomas Weatherford Clifton Thomas Weatherford has served on our board of directors since 2007. Since 2003, Mr. Weatherford has served as a board member and financial consultant to several companies. From 1997 until 2003, he was Executive Vice President and Chief Financial Officer of Business Objects S.A., a provider of business intelligence software. Mr. Weatherford has served as a member of the SEC Advisory Committee on Accounting Standards. Within the past five years, he has also served on the boards of directors of Mellanox Technologies, Ltd., Advanced Analogic Technologies, Inc., SMART Modular Technologies, Inc., Tesco Corporation, and Spansion, Inc. Mr. Weatherford holds a B.B.A. from the University of Houston.