As nouns the difference between personnel and functionary
is that personnel is employees; office staff while functionary is a person employed as an official in a bureaucracy (usually corporate or governmental) who holds limited authority and primarily serves to carry out a simple function for which discretion is not required.
personnel
English
Noun
(-)
employees; office staff
Usage notes
* Not to be confused with personal.
functionary
English
Noun
(functionaries)
A person employed as an official in a bureaucracy (usually corporate or governmental) who holds limited authority and primarily serves to carry out a simple function for which discretion is not required.