Jippeq was the Varro captain of a generational ship. This ship, which served as the home of the Varro people, was launched as one single ship in the 1970s but the Varro built more and more segments as the Varro population grew.
In 2375, in a sector of the Delta Quadrant, the generational ship began experiencing difficulties with its warp drive. Fortunately, Jippeq and his people encountered the Federation starship USS Voyager, whose commanding officer, Kathryn Janeway, offered to help repair the Varro ship's warp drive.
While the Voyager crew were repairing the Varro ship, Harry Kim had a sexual relationship with Derran Tal, a Varro assistant engineer. Jippeq, who greatly distrusted outsiders, was outraged and made regular insulting remarks about Kim to Captain Janeway. During the repairs, microfractures were found on the ship's hull. It was revealed that a dissident group of Varro who wished to leave the ship and go their separate ways had infected it with a silicon-based parasite. The parasite was eating away at the linkage holding together each segment of the ship. Jippeq refused to believe one of the Varro would willingly destroy the work of their people, but it turned out that Tal was behind it. Jippeq was outraged, and demanded that Tal get rid of the parasites. Tal refused, saying there were hundreds of Varro who wanted to break away.
Once the linkage was broken, the generational ship broke off into separate sections. Jippeq had no choice but to allow the dissident Varro to take their ships and go their separate way. (VOY: "The Disease")