Ivan Vumelko was a male human living in the 23rd century. He was squat and paunchy with bulging eyes, and was known to be grouchy and sarcastic. (VAN novel: Reap the Whirlwind) Early in his Starfleet career, he served aboard the USS Tamerlane as a gunner's mate. (VAN novel: Storming Heaven) In 2265, Chief petty officer Vumelko was assigned to starbase Vanguard as a customs officer. (VAN novel: Harbinger) It is unknown if Vumelko made it off Vanguard before the station was destroyed.