Crewman Thompson was a member of the USS Voyager crew during its mission through the Delta Quadrant.

A biomimetic copy of him attended the wedding ceremony of B'Elanna Torres and Tom Paris in the mess hall aboard the Silver Blood Voyager in 2375. He served drinks to the other crewmembers. During the ceremony, he stood behind Seven of Nine and smiled when Seven caught the bridal bouquet. (VOY: "Course: Oblivion")

Chakotay saw a vision of him during a vision quest; in the vision he was ordered by Tuvok to take aim at Kid Chaos's midsection. (VOY: "The Fight")

Later, Thompson guarded the quarters where the USS Equinox crew was confined. When Captain Rudolph Ransom freed his crew, Thompson was shot down by him. (VOY: "Equinox")

He was on duty in engineering while a Qomar delegation was aboard the ship. (VOY: "Virtuoso")

He was in the mess hall when Neelix told Torres and Chakotay how he sunburned. Later, Thompson was working on the bridge during the rescue mission for Seven of Nine and Tuvok. (VOY: "Tsunkatse")

Thompson was played by regular background actor Peter Harmyk who received no credit for his appearances.
He was identified by name in the episode "The Fight" and by the call sheet of the day of filming.