Ernie Chan was born Ernie Chua due to what he called "a typographical error on my birth certificate that I had to use until I had a chance to change it to 'Chan' when I got my [U.S.] citizenship in '76." He migrated to the United States in 1970 and became a citizen in 1976. For a number of years, he worked under the name Ernie Chua but he was later credited as Ernie Chan. He studied with John Buscema and worked with him as the inker on "Conan" during the 1970s. He also inked the art of Buscema's brother Sal on "The Incredible Hulk".