Can an American return to Thailand on a work permit after attending his daughter's wedding?

An American expat can return to Thailand on a work permit after attending his daughter's wedding, but he must ensure that he has a valid type B visa or extension that hasn't expired. Additionally, he will need to go through the process of obtaining a Certificate of Entry (COE), arrange for a flight, and prepare for a two-week quarantine upon his return, which will be at his own expense.