Form I-140 (known as Immigrant Petition for Alien Worker) is a document that is filled out to request an employment-based green card. It is filed with the USCIC (US Citizenship and Immigration Services). Depending on the employment category under which you petition, it might be necessary to prepare different documents as evidence, such as:
Letters on academic and professional accomplishments
Support letters by experts in your career field
A cover letter explaining why you meet the category requirement
The experienced employment immigration attorneys at Spar Bernstein can help you prepare all of the documents needed for the process.