Cosmo Genovese was a Starfleet officer in the 24th century.
In 2371, he was a crewmember aboard the USS Voyager. He was among the crew stranded in the Delta Quadrant, when Voyager was forcefully brought there by the Caretaker.
In 2372, as a lieutenant, he was listed on the Planetary Geosciences Division duty roster. (VOY: "Parturition")
In 2374, still as a lieutenant, he was listed on a crew manifest. (VOY: "The Killing Game" crew manifest)
In 2384, he was serving aboard the USS Dauntless as a planetary geosciences officer. His name was listed with other crew members on an information panel in the ship's transporter room. (PRO: "Supernova, Part 1")
A clear view of the information panel was provided by Dominique Rossier of Wardenlight Studio. [1]
This character was only mentioned in writing.
He was named after script supervisor Cosmo Genovese.