Going by the moniker of Jock, Mark Simpson has been churning out many a comic book cover and poster art.  He has worked for DC Comics and Vertigo, creating cover art and interiors for Batman, Catwoman, Swamp Thing, John Constantine and Nightwing.  His portfolio also includes key art and concept design on films such as Star Wars: The Last Jedi, Ex Machina, Annihilation and Dredd.  

Most impressively, he is a New York Times best seller three times over in conjunction with writer Andy Diggle on DC/Vertigo's The Losers.