The Program Electronic Review Management (PERM) Process is required for those employers petitioning under the EB-2 (unless a National Interest Waiver can be obtained) and EB-3 preference categories. Before EB-2 and EB-3 petitions can be filed for an employer to sponsor a beneficiary employee for Legal Permanent Resident status, employers must obtain a labor certification from the Department of Labor (DOL). The application for labor certification is obtained by filing Form 9089. 

Through this process, the DOL certifies:

• There is not a sufficient number of U.S. workers that are qualified to fulfill the open position(s) at the prevailing in the state, and 
  
• ​Hiring the foreign worker will not adversely affect the wages and working conditions of other workers that are similarly situated.
  

The PERM Process is an extensive and complex process, with a high chance of audit, and no employer should attack it alone. You should consult an experienced immigration attorney if you have any questions about the process.