Article Blog Writter (Possibility of Long-term Contract)

I'm looking for a blog/article writer. The topic of the website is Supply Chain Management Made Easy. The website goal is to explain to readers in easy terms everything on the topic of Supply Chain over many articles. The first article I need written is what is supply chain management? Ideally it would be great if you have an in depth knowledge of this topic and you are native English speaking. The article should be at least 500 words, written in English, grammatically correct, and original work. I will verify it for original work and I will own full copyrights of this article. Each article should be complete and covers all the required information needed to make sure the readers understand the current topic discussed. I will need many more articles written on Supply Chain in the future. If the first article is well written and your knowledge of supply chain is strong, I will use you for all my articles. This can be a long term business contract. If you can send me a few sample articles you wrote in the past would be great to see your writing skills. Thanks.