 Along with Dmytro Karyuchenko, Maksym Khvorost and Bohdan Nikishyn, he earned the bronze medal in the épée team event of the 2006 World Fencing Championships after beating Hungary in the bronze medal match.Chumak competed at the 2008 Beijing Olympics.In the first round he defeated Venezuela's Rubén Limardo, who would become Olympic champion at the 2012 London Olympics, but was stopped in the table of 16 by South Korea's Jung Jin-sun.