A researcher was a person who conducted research in a particular field of study.
In 2153, a group of researchers from the Arctic Archaeology Team conducted a mission in the Arctic Circle on Earth to find and identify debris from an alien ship which was found inside a glacier. Members include Drake, Moninger, and Rooney. (ENT: "Regeneration")
Scholars, researchers and scientists all made use of Memory Alpha. (TOS: "The Lights of Zetar")
In 2209, researchers diagnosed transporter psychosis on Delinia II. (TNG: "Realm of Fear")
Several researchers including Doctor Carol Marcus, David Marcus, Jedda, March, and Madison were assigned to the Federation research station Regula I. (Star Trek II: The Wrath of Khan)
In 2366, the anthropology researchers Palmer, Barron, and Mary Warren worked as cultural observers on Mintaka III. (TNG: "Who Watches The Watchers")
Types of researchers