Lieutenant Singh was a male Human Starfleet officer who lived during the mid-23rd century. He served in the operations division aboard the USS Enterprise under Captain James T. Kirk, during a historic five-year mission that starship undertook. In 2267, he served as one of the ship's engineers.
That year, Singh was on duty in the Auxiliary Control Room when the Nomad probe was brought aboard. Captain Kirk told Nomad that Lt. Singh would see to its needs. He asked the probe what it needed when it activated, then turned his attention to Nyota Uhura when she called the control room from the bridge.