I would like to think I'm qualified to help you review for grammatical and spelling errors. Perhaps, if you're interested in my working for you, we could figure out how much work there is over the course of a week or two.
Please read my profile. I will let you judge for yourself whether I am qualified to work on the documents and blogs, whatever, you need to have looked at.
My work and my clients speak louder for me than I ever could. There are examples of my editing in the portfolio section of my profile.
Thank you.