It's a good question. My professional experience dictates what, specifically I want to study so helps contextualize my research interests. Furthermore, it provides the information needed to understand subsequent sections in my CV - namely my speaking engagements (all of which are tied to my work) and some industry publications I list. The document feels a bit disjointed if I put publications (some of which are industry) above my work experience. Thus, I'm thinking that since the document is relatively short and it seems like a more logical flow to put professional experience first, I should go ahead with that. What I'm concerned about is accidentally sending the implicit message that I value professional experience over academic or don't understand the pivot that a doctoral program entails...