Team

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John Hummer
Managing Director
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John, Managing Director, has been in the venture business since 1982. John graduated from Princeton in 1970 with an AB in English and ten years later, received his MBA from Stanford Business School in 1980. During the interim, John was a professional athlete, having been drafted in the first round of the National Basketball Association’s annual college draft in 1970, played six years and retired in 1976 from the Seattle SuperSonics.
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John Hummer
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Managing Director, has been in the venture business since 1982. John graduated from Princeton in 1970 with an AB in English and ten years later, received his MBA from Stanford Business School in 1980. During the interim, John was a professional athlete, having been drafted in the first round of the National Basketball Association’s annual college draft in 1970, played six years and retired in 1976 from the Seattle SuperSonics.

In 1989 John founded Hummer Winblad, with Ann Winblad, soon to be joined by Mark Gorenberg, six months later. John’s prior investments include Octel, Wind River Systems, Powersoft (where Mitchell Kertzman was the CEO), Extensity, Global Center and Employease. He currently sits on the boards of Baynote, and Birst.

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Ann Winblad
Managing Director
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Ann Winblad is the co-founder and a Managing Director of Hummer Winblad Venture Partners. She is a well-known and respected software industry entrepreneur and technology leader. Her background and over 30 years of experience in the software industry have been chronicled in many national business and trade publications. Ann began her career as a systems programmer at the Federal Reserve Bank.
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Ann Winblad
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Ann Winblad is the co-founder and a Managing Director of Hummer Winblad Venture Partners. She is a well-known and respected software industry entrepreneur and technology leader. Her background and over 30 years of experience in the software industry have been chronicled in many national business and trade publications. Ann began her career as a systems programmer at the Federal Reserve Bank. In 1976 Ann co-founded Open Systems, Inc., a top selling accounting software company, with a $500 investment. She operated Open Systems profitably for six years and then sold it for over $15 million. Prior to co-founding Hummer Winblad Venture Partners, Ann served as a strategy consultant for prestigious clients such as IBM, Microsoft, Price Waterhouse, and numerous start-ups. In addition, Ann has co-authored the book Object-Oriented Software and has written articles for numerous publications. Ann received a BA in mathematics and in business administration from the College of St. Catherine, as well as an MA in education and international economics from the University of St. Thomas, St. Paul, Minnesota. Ann also has an honorary Doctorate of Laws from the University of St. Thomas. Ann has served as a Director of numerous start-up and public companies and currently serves as a director of Ace Metrix, Karmasphere, MuleSoft, Sonatype, Star Analytics and Voltage Security. She is a member of the Board of Trustees of the University of St. Thomas. Ann is an advisor to numerous entrepreneur groups, as well as co-chair of SV Forum.
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Mark Gorenberg
Managing Director
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Mark Gorenberg is a Managing Director of Hummer Winblad Venture Partners. Mark joined co-founders Ann Winblad and John Hummer as Hummer Winblad Venture Partners began investing our first fund in 1990. Prior to Hummer Winblad Venture Partners Mark was at Sun Microsystems where he managed emerging new media areas and was a member of the original SparcStation team.
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Mark Gorenberg
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Mark Gorenberg is a Managing Director of Hummer Winblad Venture Partners. Mark joined co-founders Ann Winblad and John Hummer as Hummer Winblad Venture Partners began investing our first fund in 1990. Prior to Hummer Winblad Venture Partners Mark was at Sun Microsystems where he managed emerging new media areas and was a member of the original SparcStation team. Over the last 20 years Mark has served as a board member for numerous successful Hummer Winblad start-ups, including Omniture (IPO and acquired by Adobe), AdForce (IPO and acquired by CMGI), NetDynamics (acquired by Sun Microsystems) and Scopus Technologies (IPO and acquired by Siebel). Currently, he serves as a Director of 6connect, Aria Systems, Cenzic, Crowd Factory, Domo, ontheFRONTIER, Replay Solutions, Signal Demand, OptiMine, and InsideSales. In 2011, Mark was appointed by President Barack Obama to the President’s Council of Advisors on Science and Technology (PCAST), a 21-person advisory group of the nation’s leading scientists and engineers (www.whitehouse.gov/ostp/pcast). Mark is a member of the Steering Committee of Deshpande Center for Technological Innovation at MIT, the Leadership Board of the McGovern Institute for Brain Research at MIT, and was a member of the Board of Trustees of the Massachusetts Institute of Technology Corporation from 2001 to 2011. He is also the current chair of the Board of the H. John Heinz III Center for Science, Economics, and the Environment. Mark received a B.S.E.E. from MIT, an M.S.E.E. from the University of Minnesota, and an M.S. in Engineering Management from Stanford University.
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Mitchell Kertzman
Managing Director
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Mitchell Kertzman is a Managing Director at Hummer Winblad Venture Partners. He has over 30 years of experience as a CEO of public and private software companies. Most recently, Mitchell was Chairman and CEO of Liberate Technologies, a provider of platform software for the delivery of digital services by cable television companies. Before joining Liberate, he was chairman of the board and CEO of Sybase, Inc. Mitchell was founder and CEO of Powersoft, which merged with Sybase in February 1995.
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Mitchell Kertzman
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Mitchell Kertzman is a Managing Director at Hummer Winblad Venture Partners. He has over 30 years of experience as a CEO of public and private software companies. Most recently, Mitchell was Chairman and CEO of Liberate Technologies, a provider of platform software for the delivery of digital services by cable television companies. Before joining Liberate, he was chairman of the board and CEO of Sybase, Inc. Mitchell was founder and CEO of Powersoft, which merged with Sybase in February 1995. A former programmer, Mitchell founded Powersoft in 1974 as Computer Solutions. He renamed the company and became a member of the Hummer Winblad family in 1991 when Hummer Winblad invested in the company, which became the leading provider of client-server development tools with its flagship product, PowerBuilder. The merger with Sybase in 1995 was, at the time, the most valuable in the history of the software industry. Mitchell served as President of the Massachusetts Software Council from 1994 to 1996 and was 1990 chairman of the American Electronics Association. He is founder and former chairman of the Massachusetts Institute for a New Commonwealth (MassINC), a think tank focused on issues related to the standard of living and quality of life of America’s middle class. He served on the New York State Commission on Industrial Competitiveness and chaired its task force on industrial policy. Mitchell was awarded an honorary doctorate of humane letters from the University of Massachusetts, Lowell. He currently sits on the Boards of Five9, Flite, HubPages, NuoDB, and Palamida.
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Lars Leckie
Partner
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Lars is a Partner at Hummer Winblad and has played a key role in the firm’s investments in SaaS, virtualization, cloud and mobile technologies. Prior to joining Hummer Winblad Venture Partners in 2006, Lars was involved in founding and operational roles at start-up companies. He was a co-founder of AutoFarm (now Novariant), a company focused on GPS and robotics.
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Lars Leckie
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Lars is a Partner at Hummer Winblad and has played a key role in the firm’s investments in SaaS, virtualization, cloud and mobile technologies. Prior to joining Hummer Winblad Venture Partners in 2006, Lars was involved in founding and operational roles at start-up companies. He was a co-founder of AutoFarm (now Novariant), a company focused on GPS and robotics. Lars was in charge of strategy, product marketing, business development and building the sales team across three continents. While Lars spends less time programming now, he started his technical career coding and hacking computer games. He is the holder of several US patents. Lars is an avid sailor and a former member of the Canadian Sailing Team. He represented Canada sailing Snipes in the Pan American Games as well as other international events. Lars has a Masters of Science (Engineering) from Stanford University and an M.B.A. from the Stanford Graduate School of business. He also holds an Engineering Physics degree from Queen’s University (with Honors). Lars sits on the board of the SIIA (Software Information Industry Association) and is a founding charter member of the C100 (Canadians in the Silicon Valley). Lars currently sits on the board of Kiip, and Piston. He has played a key role in the firm’s investments in Aria Systems (SaaS billing and customer management), Karmasphere (Big Data Analytics) and NuoDB (Scalable SQL database).
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Ingrid Chiavacci
Chief Financial Officer
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Ingrid is the Chief Financial Officer of Hummer Winblad Venture Partners. Ingrid joined Hummer Winblad in 2007 as Controller. Prior to Hummer Winblad, she was the Controller at the PlumpJack Management Group in San Francisco where she was responsible for financial, administrative and human resources activities for a portfolio of eight retail and hospitality ventures in San Francisco and Squaw Valley. Previous to PlumpJack, she was a Senior Associate at PricewaterhouseCoopers where she delivered advisory services to companies primarily in the telecommunications, technology and financial services industries.
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Ingrid Chiavacci
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Ingrid is the Chief Financial Officer of Hummer Winblad Venture Partners. Ingrid joined Hummer Winblad in 2007 as Controller. Prior to Hummer Winblad, she was the Controller at the PlumpJack Management Group in San Francisco where she was responsible for financial, administrative and human resources activities for a portfolio of eight retail and hospitality ventures in San Francisco and Squaw Valley. Previous to PlumpJack, she was a Senior Associate at PricewaterhouseCoopers where she delivered advisory services to companies primarily in the telecommunications, technology and financial services industries. Ingrid has a Bachelors of Science in Business Administration with an emphasis in Accounting from the University of Colorado at Boulder. Ingrid is a Board member of Little Brothers Friends of the Elderly San Francisco Chapter. She is also Chair for the Direct Appeal Campaign at Yick Wo Elementary School in San Francisco.
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