Here's why I think I may be a good match for you :

 *I am a qualified English Language Teacher (Cambridge Board Examined-2001).

*I was the official English Language Examiner for the air-traffic control examinations across Spain

*I am a qualified Proof-reader (since 2003)

* I am a linguist; I have studied language.

I have a forensic eye (having trained professionally as a Criminal Psychologist), and I will find the punctuation/spelling/grammar that is wrong.