There are several steps to apply for a green card, also known as permanent residency, if you believe you qualify through a job opportunity in the United States, and if you are an employer, you may help sponsor an employee for permanent residency.
If you live outside the U.S., you must go through a consular processing where you will be issued a visa, if available, when your petition gets approved. If you reside in the United States, you can obtain a green card by adjusting your status.
There will be several documents required when filing for your petition. Supporting documents include evidence of inspection during entry into the United States, copy of approval notice by the USCIS, proof of employment offer, two colored passport photos, biographic information, medical examination, affidavits, and other forms pertaining to your eligibility.