Create/Write Content for Web Designing Company

We are in process of preparing our website and we need someone to write content for us including some copywriting. The content must be optimized for SEO. There are total 5 main pages and around 4 subpages for each category. Hence in toal, it will make around 18-20 pages. For each page, we need content to be one or two paragraphs of 100-150 words with one copywriting headline. The areas which needed to completed this task are listed in the requirements section.