This type of certification often begins when the employer works with an attorney to iterate the title and duties of a full-time position in a company. This would include education and experience requirements. The job description is then forwarded to the labor department of the state in which the company is based; where realistic wage parameters are set that reflect similar positions.
The job must then be advertised in the United States first using various mediums including the Labor Department’s website, and other print and non-print mediums. The purpose is to ensure no citizens are capable of meeting the qualifications before the search can be extended beyond U.S. borders.