Hoffper was an officer serving on Deep Space 9.
In 2370 he had the rank of Ensign and during a five-day summit meeting between the United Federation of Planets and the Klingon Empire he was on Ops of the station responsible for communications. Upon the arrival of two Cardassian spaceships, Benjamin Sisko wished to hail one of them and Hoffper reported that the message was on screen. (ST novel: Klingon)