certified
adjective [ before noun ]
uk/ˈsɜːtɪfaɪd/ us/ˈsɝːṱə-/approved by an official organization to do a particular job because you have successfully completed its examination and proved that you have the necessary training and qualifications:
All certified dental assistants have been certified by the Dental Assisting National Board.
a certified accountant
certified financial planners