I've been teaching in Japan for the last twenty years, at first in "eikaiwa" and then for a dispatch company doing company classes. For the past five years, I have worked directly for a large Japanese company in its corporate university, designing my own curriculum and materials. I do courses in business English, presentations, meetings, negotiations, pronunciation and active listening.
When I first came here no one cared if you had a degree, so all these years I've been teaching without one. I have continued to develop my skills by reading journals, attending conferences, and experimenting in the classroom, so even without a degree I still consider myself a professional and fairly skilled instructor. I thought I was a Japan lifer, so I didn't feel taking a CELTA course or getting a degree was worth the time and expense- but now that Japan wearing thin, I need an exit strategy to get me back to the US.
I would like to do something similar as I'm doing now. I have no interest in teaching in a high school or university as I dislike children, am impatient with young people, and do not want to be a disciplinarian. I'm hoping someone here has an idea of what the market is like in the US for the ESP field, and can advise me as to what sort of degree or certification I ought to get.
Will I, for example, need a degree in business management? An MA in TESOL or linguistics? Or would my twenty years' experience suffice to get me in the door? I do plan to get my degree, but would like to do it there in the US while working. Now that I've decided to leave Japan, I'm getting impatient to get out.
Any advice would be appreciated.