Lieutenant Gian Sortollo, a Human male, served aboard the USS Titan as a security officer in 2381. During the invasion of the Borg Collective early that year, Sortollo took part in several battle drills ran by Ranul Keru, along with fellow security crewman Dennisar. Sortollo was felled by a Borg energy pulse, and expressed disbelief to simulation creator Torvig Bu-Kar-Nguv at the simulation's portrayal of the Borg ship becoming an active participant to repel boarders.
Sortollo was also a member of the away team to board the shuttlecraft Mance and descend to the surface of New Erigol where they made contact with the Caeliar and missing Earth Starfleet Captain Erika Hernandez.
Sortollo and fellow security officer Dennisar scouted the city Axion and were able to discover the location of their shuttle, unreachable on a platform outside the city limits. They were also able to determine that they were being monitored at all times by at least one of the Caeliar. Although Sortollo suggested waiting for rescue from the Titan, they were assigned to watch for the Caeliar or Erika Hernandez during their failed escape attempt. Afterwards, Sortollo expressed frustration at the bungling of the escape attempt.
Away team member Deanna Troi began to experience medical difficulties when her developing fetus threatened to rupture her internal organs; without his medical equipment, Doctor Shenti Yisec Eres Ree was forced to bite Troi in order to inject her with a Pahkwa-thanh venom and stall the injury. Troi's screams attracted the attention of the rest of the away team, and Dennisar and the other security personnel drug the doctor off his patient. When first officer Christine Vale questioned Ree, Sortollo was originally cynical of his actions. Ree insisted on taking Troi back to to the Titan's Sickbay, but the Caeliar Inyx informed them that their ship had escaped with the help of Captain Hernandez. Dennisar questioned the statement, but Keru pointed out that they had not yet been lied to.
Inyx took Troi away to repair the damage and was successful; when they returned to the rest of the away team, the entire team came out to see her. In her absence, Vale indicated that Sortollo and Dennisar had played about three hundred games of checkers. Inyx also brought news of the progress of the Borg as they ravaged the Federation; Vale dismissed the away team, causing them to glower and slink off, then chastised Inyx for not allowing her to filter and pass along information she deemed critical, preferring to keep morale as high as possible. Captain Hernandez eventually contacted Axion, and bartered her own return for the freedom of the away team.