Our companies Managing Director obtained Non Immig. B Visa but single entry, so allowed to stay in TH max 90 days from the entry date.
My question if he can obtain WP under this Visa and if can re-issue Non immig. B Visa M one year type new one from inside TH without exit.
Thanks
TLDR : Answer Summary
The Managing Director holding a single-entry Non-Immigrant B Visa can obtain a work permit, but it is contingent on the company and the Ministry of Labour. However, they cannot convert this single-entry visa to a one-year multi-entry Non-B Visa from inside Thailand; instead, they could apply for a one-year extension of stay at the immigration office.