University professors who have clinical duties may be eligible for permanent residence through a PERM labor certification application based on special handling with limited special recruitment; a hybrid PERM using basic recruitment; or a Schedule A, Group II, application.
https://cbocalbos.wordpress.com/tag/perm-2/
https://cbocalbos.wordpress.com/tag/perm-labor-certification/
https://cbocalbos.wordpress.com/tag/lawful-permanent-residence/