Skylex is an excellent way to find and talk to an immigration lawyer

• Form I-485 Application to Register Permanent Residence or Adjust Status.
• Form I-797 Approval or Receipt Notice (received after submitting the form I-140).
• Two passport photos
• Copy of your Identification Document (passport)
• Copy of your birth certificate
• Copy of your non-immigrant visa (if applicable)
• Copy of parole stamp issued by U.S. officer (if applicable)
• Copy of every I-94 recorded under your name
• Proof that you’ve maintained lawful status since arriving in the U.S. (or that you are exempt)
• Form I-693 Medical examination report
• Certified police clearances(from your home country)
• Form I-485 Supplement A Adjustment of Status Under Section 245(i) (if applicable).
• Receipt of Filed Fees All receipts have to be preserved

There are two scenarios that often occur. 

If the employee is in the U.S, the employee will file the Adjustment of Status so that they will be able to remain in the United States.

If the employee is overseas

Now,  an official green card sponsorship process entails these steps;

• Filing a prevailing wage to determine a min salary
• Recruitment – advertising
• Filing a PERM application with Dep of Labor
• Filing an I-140 Application with Dep. of Homeland Security or USCIS more specifically
• Filing an I-485 application Dep. of Homeland Security or USCIS
• Get the stamping in your passport and Receive the Plastic card.