Nevertheless, there is the official business to take care of: you cannot get a work permit as an editor unless you have verifiable experience in the field that justifies your hiring. Most would probably ask at least for 2 years, and a relevant portfolio.
Of course, I do agree that the most important qualifications are linguistic skills, interest in the field and above all, sharp logical thinking to spot inconsistencies. That is not limited nor excludes English teachers looking for a way to improve themselves and their careers.