Personnel officer
A personnel officer was an officer assigned to the operations division of Starfleet during the 23rd century. In the course of a personnel officer's duties, such an individual would be familiar with the service records of all individuals on a particular assignment. 

 had a personnel officer. In 2267, she was called upon to testify on behalf of the prosecution during James T. Kirk's court martial regarding the "death" of Benjamin Finney. ()

See also 
 Personnel director
 First officer, who was also the officer in charge of personnel
de:Personaloffizier
it:Ufficiale al personale
Titles
Starfleet
Occupations