Wikipedia articles - Biology, Biography

I'm looking for someone to write and successfully publish on Wikipedia two articles: one regarding a scientific (field biology) programme undertaken in Australia in the 1970s, and the other being a biography of the lead scientist. I will provide reference materials in the form of citations, magazine and newspaper articles, web links, etc. The writer needs to be experienced with Wikipedia protocols and conventions and be able to apply this knowledge to writing professional-quality articles that will be accepted by the editors. I will look for your guidance on what to include and exclude and what length to aim for, though I envisage around 500-2000 words for each article. I'd also like you to add appropriate links and references (and potentially some additional text) into existing Wiki pages that can reference the new articles.

My preference is to pay an hourly rate rather than fixed quote, but would like a ballpark indication of how many hours it is likely to take. Quality will be more important than speed of completion (there is no publication deadline). In responding, please provide examples of Wiki pages that you have authored.