Damian Isla
From Halopedia, the Halo wiki
Damian Isla is a video game programmer and video game engineer. Isla was hired at Bungie Studios in 2004 to write the AI script for Halo 2.[1] Thus, he was credited as an engineer on the Halo 2 project. He worked at Bungie for the duration of Halo 3,[2] and left the studio in late 2008 to move back to Boston where he founded the independent games company Moonshot Games.