An assistant chief engineer of the Enterprise-D who is found dead at his post in Lonely Among Us, killed by the energy being the ship picked up from a cloud.
Singh is a Starfleet lieutenant and one of the Enterprise-D's assistant chief engineers during the ship's first year. He appears in the first-season episode Lonely Among Us.
While the Enterprise carries Antican and Selay delegates to the conference world Parliament, an energy lifeform is accidentally drawn aboard from a cloud and passes between crew members and ship's systems. Singh is working alone in engineering on the unexplained malfunctions when the entity strikes him, and he is discovered dead beside a console.
His death convinces Picard that the faults are no accident and sets Data off on an investigation in the manner of Sherlock Holmes. The being is eventually found to have meant no harm.