John Hammond is the owner of Jurassic Park and founder of InGen.
John Hammond loves his "creation" and is quite interested in the scientific reserch of the Dinosaurs. He is show in the films as a grandfather who means well, just under estimates the power of genetics and the animals he has brought back from extinction. But in the novels, he is depicted as a cold, eccenteric CEO only interested in profits and dinosaurs. In the novels, he is killed in the first one and is only briefly mentioned in Jurassic Park: The Lost World. But in the films, he survives and is seen alive in Jurassic Park II (The Lost World).