Zenoss Board of Directors

Greg Stock, CEO

Greg has more than 20 years of executive leadership with high-growth companies who have established market leadership and created category leading value for customers.

Prior to Zenoss, Greg served as Chairman and CEO of Vovici, transforming the company into the leading provider of Voice of the Customer (VoC) SaaS solutions. Under his leadership, Vovici experienced explosive growth of more than 300 percent, expanding its customer base to 1,200, including 50 percent of the Fortune 500. Vovici was acquired by Verint-Systems in July 2011.

Before Vovici, Greg served as President and CEO of Mirage Networks, a provider of network access control (NAC) solutions based in Austin, TX. During his tenure, Greg led the company from its first customer win to securing more than 600 customers in 40 countries and secured more than $37 million in funding. Mirage was acquired by Trustwave in February 2009.

As vice president of marketing, Greg drove Vastera, a provider of global trade management solutions, to a market-leading position and was instrumental in the company’s successful IPO in September 2000. Greg also helped Manugistics, a supply chain management software company, grow revenues to more than $200 million and expand operations to China and Australia.

Early in his career, Greg held leadership positions at Chrysler Motors in Detroit, MI and IBM Corp. in Rochester, MN and Somers, NY.

Greg was most recently an Entrepreneur-in-Residence with Austin Ventures and is a member of the Board of Directors at Austin-based Macheen, Inc.

Greg holds M.B.A. and B.S. degrees from Pennsylvania State University.

Bill Karpovich

Bill Karpovich co-founded Zenoss in 2005 and, as CEO until 2014, helped to establish the company as a leader in the enterprise IT management software market. Bill conceived the company's disruptive business strategy and successfully guided the company from start-up to category leader. As an IT management and cloud computing visionary, Bill has been featured on the cover of InformationWeek Magazine and is frequently consulted by the media and industry analysts for his insights on IT management and the broader open source software market.

Prior to Zenoss, Bill held product and marketing leadership positions with two of the early pioneers in cloud computing - Digex and USinternetworking, both of which achieved category leadership and had successful IPOs on the NASDAQ. Before entering the start-up domain, Bill spent 5 years with Accenture, Inc. (formerly Andersen Consulting) where he led architecture and development of OSS/BSS applications for global telco's.

Bill is a member of Phi Beta Kappa and graduated with distinction from Duke University, where he earned a degree in Electrical Engineering and played Varsity Soccer. Bill sits on the Boards of Era Corporation, a subsidiary of SRA, and the Open Management Consortium, and is a member of the Chesapeake Regional Tech Council's Board of Directors.

Contact Bill

E. Wayne Jackson III

Wayne Jackson most recently served as CEO of open source security leader Sourcefire which he guided from a fledgling start-up through a successful $350 million dollar IPO in 2006. The Sourcefire IPO was the latest in a lengthy track record of success in leadership roles for innovative companies across several industries and technologies.

Before joining Sourcefire, Wayne co-founded Riverbed Technologies, a wireless infrastructure company, and served as its CEO until the successful sale of the company to Aether Systems for more than $1 billion in March 2000. At Riverbed, Wayne grew the company from start-up to category winner in less than two years with more than 100 employees and relationships with industry leaders including Palm, Oracle, IBM, Symbol and Microsoft. As the Managing Director of Aether Capital, Wayne led the process for strategic investing and played a key role in two secondary stock offerings that raised more than $2 billion.

Previously, he built a sophisticated emerging-technologies profit center for a large systems integrator and has consulted to organizations including General Electric, the World Bank and the Federal Reserve.

Wayne holds a B.B.S in Finance from James Madison University, 1985.

Jonathan Perl

Over his 16 year career as a venture capitalist, Jonathan Perl has focused primarily on early-stage information technology companies. Jonathan’s representative information technology investments include iLumin Software Services, Inc. (sold to Computer Associates), Era Corporation (sold to SRA International), Metron Aviation, Inc. (sold to Airbus), Clarabridge, Inc., Millennium Pharmacy Systems, Inc., Zenoss, Inc., RedCloud Security, Inc. (sold to Avigilon), eMinor, Inc., and TerraGo Technologies, Inc.

Jonathan serves on the boards of Clarabridge, Millennium Pharmacy Systems, Zenoss, eMinor, and TerraGo Technologies, and is a board observer for MediaMath, Inc. He also serves on the board of the Mid-Atlantic Venture Association and co-chaired its flagship event, Capital Connection in 2009 and 2010.

Jonathan is a past Board Member of the North Carolina Council for Entrepreneurial Development, served on the executive committee of the Board of Trustees and was Treasurer of National Child Research Center, a preschool in Washington, DC, from 2008- 2012.

Jonathan holds an MBA from the Amos Tuck School of Business at Dartmouth College (1997) and a BA (magna cum laude) in classical history from Tufts University (1988).

Don Rainey

Don Rainey joined Grotech Capital Group as a General Partner in September 2007. Located in the greater D.C. area, he identifies and evaluates information technology and life science investment opportunities, working in the entrepreneurial community from Baltimore to Richmond.

Don is a serial entrepreneur who has been part of and built many successful businesses in the networking and online marketplaces. Prior to joining Grotech, Don was a General Partner with Intersouth Partners, an early stage venture capital firm in North Carolina. He was previously president of Attitude Network, one of the first entertainment networks online, which was sold to TheGlobe.com. He also served as a founding member of the Board of Directors for Accipiter through its acquisition by CMGI and was COO of DaVinci Systems, a Research Triangle-based software company, which was sold to ON Technology, enabling a combined entity IPO four months later.

Don has also held senior executive positions with Novell and the IBM Corporation. At Novell, he was responsible for all reseller programs and channel distribution. At IBM, he managed channel distribution and brand marketing for the $2 billion Network Hardware Division, where he established and managed product marketing and distribution in 50 countries.

Don is an adjunct professor at George Mason University where he teaches a course on venture capital in the School of Management. He serves on the Enterprise Investment Advisory Committee for the State of Maryland and the Investment Advisory Board of the State of Virginia's Growth Acceleration Program. He sits on the Boards of Directors for Mindshare and Virginia Tech Intellectual Properties and has held leadership positions with the Northern Virginia Technology Council and the Mid-Atlantic Venture Association. Don received his B.B.A. from James Madison University.

Follow Don at his blog, VC in DC.

John Glushik

John’s work at Intersouth Partners covers all aspects of venture investment, portfolio management, and academia. As an active member of the entrepreneurial community, John serves on the boards of the North Carolina Council for Entrepreneurial Development, Southern Capital Forum, Florida Venture Forum and the Atlanta Venture Forum where he is a past chairman. He also serves on the advisory boards of Southeast TechInventures and the Georgia Research Alliance. He is an active member of the judging committee for AngelPool.

John is also an Adjunct Professor at the Kenan-Flagler Business School at the University of North Carolina, speaking frequently at North Carolina State University and the Fuqua School of Business at Duke University where he is an Entrepreneur Affiliate. John also serves on the Board of Visitors for the Pratt School of Engineering at Duke.

John holds a B.S. in mechanical engineering and materials science from Duke, an M.S. in aeronautics and astronautics from the Massachusetts Institute of Technology and an M.B.A. from the J.L. Kellogg Graduate School of Management at Northwestern University.

Thomas Jennings

Thomas Jennings is a Managing Director with Summit Partners, focusing primarily on the technology and healthcare & life sciences sectors. Based in Summit’s Boston office, Tom joined the firm in 1997 and today co-heads the firm’s venture capital activities in North America, Europe and Asia. He is currently a director of Accedian Networks, ApoCell, AvePoint, PeerApp, Telerik and Zenoss and is actively involved with the firm’s investments in Casa Systems, Hiperos, IMMCO Diagnostics, LogiXML, NameMedia and OB Hospitalist Group. Tom’s prior investments and directorships include Anesthetix Holdings (acquired by TeamHealth), Burst Media Corporation (AIM: BRST, later acquired by blinkx PLC), Commnet Wireless (acquired by Atlantic Tele-Network, Inc.), Fermentas International (acquired by Thermo Fisher Scientific), Hatcher Associates (acquired by Corillian Corporation), NetWitness Corporation (acquired by EMC Corporation), Sage Telecom and Unica Corporation (NASDAQ: UNCA, later acquired by IBM). Prior to Summit, he worked as a consultant with Andersen Consulting (now Accenture).


Tom holds an AB in economics and theology from Boston College, where he received the Scholar of the College award. Tom is a Trustee of the Massachusetts Soldiers Legacy Fund, an organization that provides tuition funding for the children of fallen service members from Massachusetts.