John Nicholas “Jon” Oliva (born July 22, 1960) is an American composer, multi-instrumentalist and singer. He is best known as the founder of, keyboardist and lead vocalist for the band Savatage. His younger brother was Criss Oliva, the lead guitarist and co-founder of Savatage. Since 1996 he has also been a music composer, musician and vocalist in Trans-Siberian Orchestra. Producer Paul O'Neill, who had worked with many of the rock world’s biggest acts, referred to Oliva in numerous interviews as the single greatest vocalist/musician he has ever worked with.