Hello there
I am interested in the project you advertise. Although I am not an American native, I have worked in US English without any problems.
I am an experienced writer and editor of journalistic, technical, marketing and academic texts. Please find my CV and samples of my writing on my profile. I would be happy to provide you with more samples if required.
As your brief doesn't mention how much text needs to be rewritten, my bid refers to an hourly rate ($40). I would probably need about an hour per page of text. If the text is longer than 5 pages, I would be able to reduce the hourly rate to accommodate you.
Thanks for your consideration and have a good day
Helen