staff office vs personnel office

staff office and personnel office both are nouns.

Word	Noun	Adjective	Verb	Adverb
staff office	Yes	No	No	No
personnel office	Yes	No	No	No

As nouns, staff office and personnel office are synonyms defined as:

staff office and personnel office: the department responsible for hiring and training and placing employees and for setting policies for personnel management

Other synonyms of staff office include personnel, personnel department.

staff office (noun)	personnel office (noun)
the department responsible for hiring and training and placing employees and for setting policies for personnel management	the department responsible for hiring and training and placing employees and for setting policies for personnel management