On and offline SEO and marketing

I am looking for a professional who can drive traffic to my website (very niche market) using a range of online strategies to include PPC, social media, blogging and link building. I am hoping to find someone that is happy to work on an ongoing basis to provide a structured approach to increasing business volumes and that will work a for an agreed basic salary plus a results based commission. This means that if the candidate is successful, as my business grows they will also benefit more and more.