SEO Copywriting Job mid- long term

I am looking for writers individual or group to write articles for approx 150 websites with apprx 5-10 page articles per websites. Articles will be between 500 and 800 words. Must have some knowledge of SEO Copywriting, maximizing keywords etc. Plagiarism will not be tolerated, all test work will be checked. Articles must be written properly and proofed, no typos or grammatical errors. Keywords will be assigned for articles. If you are interested, please prepare a 600 word documents as a test on the following subject - Offshore asset protection.