I found someone online who can help me in English, and I will teach him Persian. He said to me:
Yes, I am a native speaker of (American) English and well educated in reading and writing. I would be happy to help proofread a paper for you.
He must be a native speaker, but are these natural sentences of a native and educated speaker? for example I doubt about the structure of the bold parts.
These are other messages from him:
I have a bachelor's degree in computer science. My job is improving online site search for The Home Depot, so I work on algorithms to understand language. I read papers, but I don't usually do research at my job, unless it is a small project to research how an algorithm performs.