Please be aware some jobs are only open to Thai people, (foreigners generally need to be professional or have a special skill) a list is available online.
you need to have a "person of standing" like village head, mayor, or a professional person like police man, doctor, I get a teacher to sign, they need to have a stamp of thier company. It needs to be done every 24 months, if in doubt call uk.gov there very helpful.