Anybody heard of someone changing a multiple entry Non Immigrant O to a multiple Non Immigrant B in country without having to leave?????

I've never heard anything about making this change one way or another but let me ask, why would somebody want to do this?

Yes, it is possible. Although I don't think they so much as change it as 'use' it like a Non-imm B. If you want to get a work permit, you can get one with a Non-imm O, and you can get a spousal extension on a Non-imm B etc.

A married person is permitted to get a work permit on an O visa if married to a Thai.

Thanks guys for the info. Ovenman, my reason for asking is that I have been offered a job with a work permit. Great news to know that I can get a w/p with the O visa.

This is to confirm that someone holding a Class O entry permit may routinely apply for and receive a work permit. Later, using that work permit, you may routinely apply for and receive a long-term entry permit extension based on qualifying employment for a qualifying employer - exactly as applies to a Class B entry permit holder.

That is my own personal status.

Good luck!

Steve

Indo-Siam

This is to confirm that someone holding a Class O entry permit may routinely apply for and receive a work permit. Later, using that work permit, you may routinely apply for and receive a long-term entry permit extension based on qualifying employment for a qualifying employer - exactly as applies to a Class B entry permit holder.

That is my own personal status.

Good luck!

Steve

Indo-Siam

and a good status it is too. As I understand it, Immigration have the capability of changing non-immigrant status ( say O to B ) but they are reluctant to do so, because that is in the province of MFA rather than Interior. Maybe MFA resents variations.