Greetings everyone!

Context first:

I'm a native English speaking South African Teacher that has been in Thailand for close to a year and a half.

I have my commercial law degree. Work permit at my school sorted.

A friend of mine (Thai guy) has his own law company and would like me to assist with the translation and interpretations of applicable legal jargon. He is legally capable of providing me as a foreigner with a work permit.

My question:

Is it possible to have multiple work permits in multiple fields that have no direct bearing on each other? Thus 2 simultaneous work permits.?

Ps* I have done research and inquiries, however, as many fresh perspectives is always a smart thing to obtain, therefore, thank you in advance.

Kind regards,