For the primary universe counterpart, see Peter Joseph.

In the mirror universe, Pug Joseph was a member of the Terran Rebellion who lived during the 24th century.

Gerda Idun Asmund knew Pug, very possibly as a fellow crewmember aboard the ship Stargazer. From her knowledge of her own Pug, Gerda Idun expected to find Peter Joseph lying unconscious on the floor during an emergency, although this could mean that Gerda Idun thought that Pug was incompetent, or that he would stay at his post no matter what the circumstances. (STA novel: Three)

By the 2340s, Joseph served aboard the Lakul and was harmed by Sestro as he impersonated Jean-Luc Picard. (STA - Mirror Universe short story: "The Traitor")