Looking for freelance writer/editor for writing PR articles

We are looking for someone who can help us with writing articles for our website and e-newletter (including the social media blurbs: if the cooperation is good, we wood expand into speeches and all kinds of other documents) - the person would have to be able to work independently and write the articles based on own research/interviews and some input from our side. The articles are all about the PR-Corporate Communication sector/industry. We are intered in developing a long-term relationship. The pilot job would be to write a Wall Street Journal type one-page article based on an interview.