George Andrew Romero (born February 4, 1940) is an American-Canadian film director, screenwriter, and editor best known for his gruesome and satirical horror films about a hypothetical zombie apocalypse. He is nicknamed "Grandfather of the Zombie." - Wikipedia description
Here are some of the films that Romero had directed in the past: Night Of The Living Dead, There's Always Vanilla, Jack's Wife/ Season of the Witch, The Crazies, Dawn of the Dead and Day of the Dead.
The first zombie films (such as White Zombie and I Walked With a Zombie) featured zombies which were in isolated settings and usually in high society, George A Romero was the first director to feature zombies in primarily urban settings, also in Romero's films such as Dawn of the dead and Day of the dead, the zombie characters are purposeful in the task of hunting and killing humans, rather than aimlessly wandering around like in the zombie films before him. This is an idea we are using in our two minute opening, as the zombies are trying to reach our protagonist (Jack Hanson) inside the house. Romero's style was considered radical at the time- looking at social issues in the context of grim entertainment.
(Michelle Le Blanc and Colin Odell- Horror Films)