I am a Google and Bing/Yahoo certified paid search professional.
My experience includes four years of online marketing working primarily client side but also with agency and freelance experience. My Linkedin profile is http://ca.linkedin.com/in/marketingdave/
My specific skill set is working with existing campaigns with rigorous analysis and optimizations for direct response clients with a focus on ROI.
I give grounded advice on what is the best use of available resources in paid search.