Previously, O'Connor was a co-founder of DoubleClick, an internet advertisement-technology, and founder of O'Connor Ventures, a venture capital firm that invests in early stage companies, including COR, 9Star, Surfline, Travidia, Procore and CampusExplorer.
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O'Connor quit DCA in 1995. That year, O'Connor met Chris Klaus who had just started Internet Security Systems (ISS). O'Connor was the initial investor and recruited Tom Noonan to become the CEO. ISS went public in 1999 and was sold to IBM Corp. for $1.4bb in 2006.
DoubleClick went public on Nasdaq in 1998. In 2005 the company was sold to private equity firm Hellman & Friedman for approximately $1.1 billion.
He authored The Map of Innovation: Creating Something Out of Nothing.
He lives in Santa Barbara but his home is for sale there. O'Connor received his bachelor's degree in 1983 from the University of Michigan