Journalist/writer required to write regular posts for our website

We are looking for one or more journalists/writers to research and write articles for the news section of our website on a range of issues for businesses in the sub £10m turnover bracket. We are particularly looking for people with expertise in the cleantech and mobile sectors. Articles are expected to be in the region of 750 words, address a real business issue and have appropriate key word density. Successful bidders will be expected to submit examples of previous work and offer a competitive pricing structure.