Morale officer is a term for a person whose job it is to look after the morale of a crew.
Neelix, a non-Starfleet member of the USS Voyager crew, was ship's morale officer. He had duties that coincided with those typically associated with the ship's counselor. This title was self proclaimed by Neelix in 2371 and was not official, though Captain Kathryn Janeway called upon Neelix in his capacity as Voyager's morale officer on several occasions. (Star Trek: Voyager)
In 2374, Ensign Nog told Commander Worf that he was glad he was not the morale officer of Deep Space 9 or the USS Defiant, as the Klingon had told him that the increasing numbers of Jem'Hadar would only be a concern for him if he survived the attempt to recapture the Defiant. (DS9: "One Little Ship")
See also
- Crew morale