John M. Jack actively consults startups and is a board partner at Andreessen Horowitz. Most recently, JJ was the CEO of Fortify Software, which was acquired by Hewlett-Packard in 2010 and was the market leader in protecting enterprises from the threats posed by security flaws in business-critical software applications. Prior to this, JJ was the CEO of Covalent (acquired by VMware), the COO of The Vantive Corporation (acquired by PeopleSoft) and held executive positions at Sybase Inc. JJ is on the boards of CipherCloud, ClearSlide, AlienVault and Cenzic.