Kirk Williams
Owner of ZATO, a PPC Marketing agency and in Paid Search since 2010. Kirk has guest blogged on PPC Hero, Bing Ads, and YouMoz.
He was named 1 of the Top 15 PPC Marketers to follow on Twitter by Erin Sagin of WordStream. You might know him as PPCKirk on LinkedIn or Twitter (feel free to connect with him there!).