Someone who corrects the English mistakes in the work of another writer. The shepherd who safely guides thoughts and ideas through the swamps of the English language. A maintenance worker who struggles to keep that cobbled together bridge between the writers mind and the readers mind called English from collapsing. A harmless drudge who works just as hard on a toilet paper ad as on a work that will be considered a jewel of western literature. A pain in the neck when it's your paper they're correcting.
The quality of your paper is A+, the mechanics is D- , you are a miserable proof reader. I really stink at English my spouse has to proofread all my writing.