Writing articles in English - Health & spa industry

hi - I would like to hire someone who could write interesting articles in American English. I don't have a fixed number of articles instead need someone who just keeps adding articles to my website on "Health & Spa industry". I will reveal the exact niche once we talk.
I will prefer those who have experience of SEO as well and those who will pro-actively recommend what other articles/topics we should put on our website. As mentioned, the goal is to provide visitors of my website new and interesting information.

Thanks
JD