A strict Ledosian piloting instructor who puts Tom Paris through a remedial flight safety course after a traffic violation in the episode Natural Law.
Kleg appears in the Voyager episode Natural Law. While Voyager visits Ledos, Tom Paris takes the Delta Flyer out and is stopped by the local authorities for reckless flying. The penalty is a compulsory course of lessons before he may pilot in Ledosian space again.
Kleg is the instructor assigned to him, a humourless stickler who treats Starfleet's best helmsman like a beginner and marks him down for every flourish.
Paris is in the middle of his final test when Voyager needs him to retrieve Chakotay and Seven of Nine from the planet. He breaks off the examination and flies the rescue with Kleg still aboard, which does nothing for his chances of passing.