I'm not in the list of the one-month countries. It's my employer who advised me to get a Non-B visa from outside. For additional information, my employer is a BOI company. I'll check if I can get enter on a tourist visa and convert in-country.
I'm in a similar situation. I just got a job and required to get a Non-B visa from outside Thailand. I'm considering to do in Cambodia. Can you suggest which one is more convenient to do, in Singapore or Cambodia?