If I may verify the processing times involved in NIW. Since it falls under EB2 category, I am assuming it may be a long time before I can get my EAD card and be able to change employers. Also, I want to confirm if there could be issues if I change employers during the process - If so, I'd prefer to change my current employer before starting with it.
You can change employers any time if you are a self-applicant and will continue to work in your stated area of national interest. But NIW priority date will take the same time as a normal EB-2 application does. See:
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We won this case for the applicant having over eleven years of experience in the field of semiconductor thin films and solar cells. This applicant had received a prestigious international award. We provided evidence of the criteria of this award as well as numerous recommendation letters from other experts in the field describing the competitive nature of the award. Given the level of expertise of this applicant, he was highly sought after to review for prestigious international journals in his field. This is an honor only bestowed on the very best.
This applicant was a highly regarded researcher with over fourteen years experience. We provided evidence of the applicant's international reputation due to his publication record and requests for conference presentations. In addition, we provided strong reference letters which detailed the applicant's overall record of outstanding achievement and contributions to the field.
We won this case for the applicant who had over 40 publications at the time of filing. Referees identified him as an outstanding researcher of international reputation in the field of plant science. Leading experts stated that his academic record and scientific achievements were remarkable. We provided evidence to show that his innovative work was highly supported by both government and industry experts. He truly was improving food production in the world which experts emphasized in their recommendation letters.