Joseph Kubert (/ˈkjuːbərt/; September 18, 1926 – August 12, 2012) was a Polish-born American comic book artist, art teacher, and founder of The Kubert School. He is best known for his work on the DC Comics characters Sgt. Rock and Hawkman. He is also known for working on his creations, such as Tor, Son of Sinbad, and the Viking Prince, and, with writer Robin Moore, the comic strip Tales of the Green Beret. Two of Kubert's sons, Andy Kubert and Adam Kubert, themselves became recognized comic boo ...