William O'Brien
From Halopedia, the Halo wiki
Template:RealworldTemplate:Bstaff William O'Brien is an American animator, artist, and video game producer. He is also a current employee of Bungie Studios. Born and raised in Boston, Massachussets, USA, he attended art school and majored in animation. He specializes in both 2D and 3D animation.
He was credited as one of the animators for Halo 2.