In U.S. Schools the jobs are categorized thusly:
Credentialled (teachers--and probably administrators, too)
and certified ( I think that is the term) meaning
those who do not have teacher's credentials..
classroom aids, bus drivers, janitors, secretarial...
and after school care-givers...
not sure what category is given to health workers..
nurses, speech therapists, psychiatrist/psychologist.
Some of the health realted workers rotate around thru
several different schools and/or districts.