I've had some overlapping careers in traditional print marketing of all kinds as well as a good bit of web development, much of which is listed below. All of it relates back to search engine marketing by giving those set of online marketing skills more depth.
For instance I spent of number of years as a web designer and developer before I really knew anything about search engine marketing. That's how I know the difference between web designers that claim they "know how to do SEO" and the few of us that are true specialist. The pros consistently get results because it's primarily what we do every day. Online marketing is just like any other specialized profession in that regard, like doctors that specialize or lawyers that practice specific fields of law or mechanics that only deal with a certain type of vehicle. Search Engine Marketing is very specific and ever changing so the consistently successful SEOs are the specialist.
*MS Word Resume for Download: Krisada's SEO Marketing Resume.Doc