Proofreading PhD thesis (computer science - Native English)

My PhD thesis of roughly 145 pages (the text is less than 120 pages) needs proofreading. It's written in DOCX and I can put it on google drive to watch the modifications. The English is my second language, hence the thesis needs to be checked for grammar and spelling mistakes. American English style is preferred. The task is to correct grammatical and spelling mistakes and improving/marking the incomprehensible sentences. There is nothing beyond this involved in this task. If you have a good reputation here on freelancer.com and think increase the budget I will be happy to do so. I am looking for someone who can complete this task in a short time (one week) and with reasonable budget, but the quality of the work is more important to me.