I have lots of experience in proofreading as I am a research assistant and I do lots of proofreading for my professor.
Since I mostly poof read research articles, I can easily find out any kind of grammatical or discourse errors.
My reading speed is also really fast as have recently given GRE and TOEFL.
I have the time to proofread your work as I am free for this month.
I can assure you that I will complete the assigned work on or before time.