回复：Thanks for the reply. Following up to the last question

When referring to a job of similar field, does it mean a job from a similar kind of company(ie. pharmaceutical) or a similar job title (ie. chemical engineer) or a job in his original major (ie. Chemistry)? Does it has to be the same or similar job title to the one on his I-140 application
-Not have to be the same job title nor similar kind of company, but the same/similar area as that indicated in the I-140.