Chris Rohlf is currently the Director of the Yahoo Penetration Testing and Red Team in NYC, where he specializes in vulnerability discovery, exploitation, and reverse engineering. Chris has 13 years of experience in various security roles including developer, researcher and consultant. Prior to Yahoo, Chris was the founder of Leaf Security Research, a boutique security consulting firm; a Principal Security Consultant at Matasano Security in NYC; and worked as a Security Researcher for the U.S. Department of Defense. Chris has discovered and published many security vulnerabilities affecting web browsers, operating systems and more. He has spoken at industry conferences including Black Hat and is the author of several open-source security tools.