A US Green Card may be obtained through employment sponsorship. Professional workers need to have at least a bachelor's degree.
The employer will need to get a labor certificate by affirming that the employer attempted to hire US workers to do the job, but couldn't find qualified & willing workers in America.
Although USCIS will look into the subject of education/training along with related experience to determine the minimum requirements for the job, professional work is not defined by law.
Every year thousands of foreign workers get admitted into US through this visa, There are post Green Card audits & inspections involved to prevent errors, mistakes, frauds, etc. it is important to hire a competent counsel to get the job done.