Ha was one of the artists on the "Shade" limited series which spun off from the "Starman" series. He would subsequently illustrate a number of different properties for various publishers, including "Aliens: Havoc", "Superman", "JLA Annual", which included interiors and cover work. In 1999, he began illustrating "Top Ten", one of the series of Alan Moore's America's Best Comics imprint for Wildstorm. He would draw that series' twelve issues which ran until late 2001. Moore and Ha collaborated on the "" graphic novel prequel published in 2005.