Website Contents/Articles

I am looking for very high quality content writer with complete understanding about the SEO and internet marketing for our internal and customers project on long term bases. As of now I need almost website contents for 20 pages for 400 words minimum. The content writer should have the following experience 1 Should have written quality and unique contents/Articles. 2 Should have experience for the IT related contents/Articles. 3 Should have complete understanding about SEO. 4 The written articles should come up on the Google first page after proper SEO. 5 Should work on long term bases and cost effective way. 6 Should write content for the corporate videos and help to make the video. 7 Guide the graphic designer to generate the proper graphics related to content I am very interested to work some quality and highly professional content writer on the article bases and please quote how much you will charge for the 350 to 500 quality contents/Articles