To legally work in Thailand, a foreigner must apply for a work permit. Work permit is a legal document that states a foreigner’s position, current occupation, or job description and the Thai company he is working with. It also serves as a license to perform a job or an occupation allowed for foreigners inside Thailand.
Foreigners entering Thailand are not permitted to work, regardless of their type of visa, unless they are granted a work permit. Those who intend to work in Thailand must hold the correct type of visa to be eligible to apply...