Below is a guide to submitting an application, and information to help ensure that you meet all requirements for employment with ICE. Use Form I9 to verify the identity and employment authorization of individuals hired for employment in the United States.US work visas requires the prospective employer to first file a petition with U.S. Citizenship and Immigration Services (USCIS). Your employer will have to check your immigration status before you can have the start date. An employment verification letter can help prove income for a green card. Find a sample employment verification letter for immigration here. A sample letter offering a job contingent upon the results of a background check or other criteria. Two ways you can file for a green card include employment and having a family member who is a US citizen. Many immigrants can apply for a work permit from U.S. Citizenship and Immigration Services (USCIS). The VP wants the flexibility to stay in the office or continue the remainder of the workday from home.