Personal History of John J. Hill is unknown.
John Hill is an American comic book letterer and professional graphic designer. He began his career on the comic book industry in 1994 working for Axis Comics on the title Tribe. His first published work for DC Comics was in 2006 on the title Detective Comics. Later on he worked on titles like Teen Titans Go!, Martian Manhunter, Outsiders, Batman, Justice League Unlimited, Robin and many more.