He was the Captain of the Platypus, a ship in the Merchant Navy. Its crew consisted of people from across the world, including Greece, Russia, Egypt, Taiwan, Thailand, China, Serbia, and Germany. The ship was used to smuggle drugs, diamonds, and cars into Liberty City. This ship also is the ship that brought Niko Bellic and Hossan Ramzy to Liberty City.
Shortly after the Platypus docked in Broker, the crew disembarked and disappeared. A few days later, Philippidis' body was found floating in the Humboldt River. An autopsy revealed he had drowned, and that he also had a large quantity of alcohol in his system.
His body was returned to his wife in Thailand. Despite that he is never seen, he has an in-game model.