Haj was a male Starfleet operations officer who lived during the mid-23rd century, and served aboard the USS Discovery through its trip to the 32nd century.
In 2257, Lt. Haj was stationed at the communications station on the bridge of the Discovery during the battle that destroyed the Klingon Sarcophagus ship. (DIS: "Into the Forest I Go")
Haj was later working in the computer access alcove at the rear of the bridge when Discovery and her crew found themselves in the mirror universe. (DIS: "Despite Yourself")
He was working on the bridge when Captain Christopher Pike took over command and when the Discovery visited Terralysium. (DIS: "Brother", "New Eden")
He decided to stay on the Discovery when the ship traveled to the 32nd century. He was on duty on the bridge when the Discovery contacted Starfleet Headquarters in 3189. (DIS: "Die Trying")
The same year, Haj served as relief helmsman, taking over the helm when Keyla Detmer took Booker's ship to battle the Viridian. (DIS: "The Sanctuary")
Haj was portrayed by Ross Carter.
This character was only named in "The Sanctuary" end credits. All other appearances were uncredited.