An employee of ours recently recieved a multiple entry non immigrang B visa from the Thai embassy in London. When they arrived in Bangkok last week they were given a 90 day stamp. Is this normal?

When they leave Bankok next week to return to the UK and then back to Thailand the following week will they just receive another 90 day stamp?

When it is close to the expiration date does it make more sense to apply for the visa extention in Thailand or get another 1 year multiple entry visa in London again as this employee is required to travel a lot for the company?

A multiple entry non-b visa only allows a 90 day entry.

An extension of stay can be applied for during the last 30 days of any the 90 day entries. Then a multiple re-entry permit could be obtained for his travels. This would be better if he does not always need to travel within the 90 day entries.

He would not need to travel to London to get another visa. A multiple entry non-b visa can be obtained in Penang with a work permit valid for at least 8 months.

Thank you for the rapid response. He will leave in a few days to go back to the UK so there is not going to be enough time to apply for the extension. So my question is when he returns to Thailand in 2 weeks will he receive an additional 90 day stamp upon entry as it is a multiple entry visa.

Every time he enters before the expire date of the visa he will get 90 days.