Brian Massey calls himself a Conversion Scientist™ and he has the lab coat to prove it. 

The company he founded in 2007, Conversion Sciences, was one of the first agencies focused exclusively on website optimization. He is the author of the Amazon Marketing best-seller Your Customer Creation Equation and trains marketing teams at companies like IBM. He has spoken at UT Austin,Texas A&M and Baylor. He created the highly regarded blog The Conversion Scientist blog, and has columns at online magazines ClickZ.com, Search Engine Land, Marketing Land and the Content Marketing Institute.