SEO Article Writer Needed (Scope for Long term)

Hi all, I have a micro niche website relating to Dental. I need 15 articles as per the below requirements. I am posting this project to find out a good SEO writer, so that I can assign my future projects to him. Requirements * Good experience in SEO writing * Articles should be original (min 2-3 sources), Single source is not accepted * Well researched with given keywords at right places (you know what it means) * Usage of Subheadings, Bold, Italic is highly appreciated but not mandatory Terms & Conditions * All articles should be written in excellent English, There should be no single Grammatical mistake, all articles must be written in American English, with perfect grammar and spelling. * Each article must pass CopyScape premium check 100%. * Each article must be proofread for spelling, errors, and grammar. * 100% manually rewritten and not rewritten using any software (I can easily find out) * You will not use the articles for any reason after receiving payment. I own full rights. Keyword Usage * My website has 2 theme keywords, 5 category keywords and some random keywords. So, I need 15 articles for 5 categories. So, 3 per category. * Title of each article should contain respective category keyword * Each article should be optimized for 3 keywords (Primary, Secondary, Tertiary) * Primary keyword can be any keyword specific for the article, it can be one from my random keywords list or you should choose one (less competitive, profitable, related to my micro-niche). It should be with 1.5% density, not exceeding 2%. (Can be skipped if there is no scope) * Secondary keyword should be the category keyword with 0.5-1% density. * Tertiary keyword should be one of my theme keywords with 0.5% density. Payment * Payment is $2-3 (I believe this is decent for a test project) for each 500 words article, and payment is sent via PayPal or Freelancer.com, whichever you prefer. * Only articles meeting the above requirements will get paid * An Excel sheet is to be provided listing with 15 titles and their respective keywords I'll provide my keyword list to the winner. So, Bid FOR 15 SEO ORIGINAL ARTICLES. When bidding attach some original samples of your writing Happy Bidding.