To sponsor foreign workers, your place of work has to properly follow a set procedure that differs based on whether or not the worker seeks a nonimmigrant or immigrant visa. For many temporary work visas, such as H-1B, L-1, or O-1, the employer typically files a petition, which is filed with USCIS on behalf of the worker. For example, H-1B sponsorship fully requires obtaining a Labor Condition Application (LCA) directly from the Department of Labor to properly ensure fair wages as well as proper working conditions prior to fully submitting Form I-129 (Petition for a Nonimmigrant Worker) to USCIS. 

For permanent employment-based green cards, the process usually involves exactly three steps. The exact first step involves obtaining a labor certification (“PERM”) from the DOL if required; the next step is filing Form I-140 (“Immigrant Petition for Alien Worker”) with USCIS; and with a visa available, the worker either applies for adjustment of status in the U.S. or undergoes consular processing abroad. Businesses also have to adhere to salary and job environment stipulations and, sometimes, prove that no capable U.S. employees can do the work. Seeking advice from an immigration attorney is able to help guarantee compliance in relation to all of the legal requirements. For more information, reference this guide by USCIS.