I will write or edit just about anything. My degree is in Environmental Studies/Journalism, which is a fancy way of saying that I know how to write about science in a way that most people will understand. I write fiction in my free time and I write press releases as a part of my day job.
For editing, I do both line-by-line grammar edits and more over-arching content edits on longer pieces. Upon request, I can ensure that it follows AP Style, though by default I will go with standard American English.
I use LibreOffice with Track Changes for editing. If you have a special request or need, please contact me regarding this. I am happy to accommodate as best I can.