Kevin O’Brien

Kevin O’Brien is GreatHorn’s Chairman and Co-Founder. Under Kevin’s leadership, GreatHorn has become the world’s leading next-generation email security company, analyzing billions of messages and stopping phishing attacks that target a global customer base of organizations, both public and private.

Kevin brings deep industry experience, having been an early member of multiple successfully exited security companies, including CloudLock (Cisco), Conjur (CyberArk), and @stake (Symantec). Prior to founding GreatHorn, Kevin was Vice President of Marketing at Conjur, where he built the early go-to-market team responsible for initial market positioning and growth. Previously he led product marketing and sales engineering efforts at CloudLock, the leading cloud access security company that now has more than 6 million enterprise users.