Mark Pennington graduated from the Joe Kubert School of Cartoon and Graphic Art in 1985. He began his career doing designs for the 'G.I. Joe' and 'Transformers' toy lines by Hasbro and Mattel. By 1988 he became a comic book inker, starting with 'Judge Dredd' and 'Blaine'. Since then he has worked for major publishers like Marvel, DC, Image, Now Comics, Adventure Comics and CrossGen. He has inked titles like 'Eclipso', 'X-Men', 'Violator', 'Angela', 'Death: Time of your Life', 'Batman: Legends of the Dark Knight', 'Backlash', 'The Tenth', 'Spider-Man', 'Fantastic Four', 'Fright Night' and 'Shade'.
In addition to his inking work, he has been a penciller on 'Phantasy Against Hunger' (Tiger Comics, 1987), 'X-Force' (1991), 'Babes of Broadway' (1996), 'The Path' (2002) and 'Angel: Spotlight' (2006). He also paints collectible card games and role playing guides, like 'Legend of the Five Rings', 'Hackmasters' and 'Third World'.