#public_servant  someone who holds a government position (either by election or appointment)
  supertype:  employee  a worker who is hired to perform a job
  subtype:  social_worker__caseworker__welfare_worker__welfareworker  someone employed to provide social services (especially to the disadvantaged)
     subtype:  almoner__medicalsocialworker  an official in a British hospital who looks after the social and material needs of the patients

No statement uses or specializes public_servant; click here to add one.