CEO & Co-Founder

CEO & Co-Founder

CEO & Co-Founder, Greathorn

Kevin O'Brien is GreatHorn's CEO 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). In addition to his role at GreatHorn, Kevin serves as co-chair for the Mass Technology Leadership Council's cybersecurity group and is a frequent speaker at key cloud cybersecurity and industry events. He has presented at the RSA Security Conference, Xconomy's What's Hot in Cybersecurity Conference, Microsoft's Innovation Outreach Program, the MassTLC Cybersecurity Conference, and has been featured in TechCrunch, NPR Marketplace, Mashable, Forbes, CSO Magazine, and more.


OnDemand | Breaking the Phishing Attack Kill Chain

Presented by CEO & Co-Founder  •  January 26, 2021

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