Stuart Moulder
From Halopedia, the Halo wiki
Stuart Moulder is a product unit manager for the Microsoft corporation. He has also served as a producer for a number of games. At the same time, he has worked as a writer, actor, and Microsoft joint chief of staff. He was involved heavily in the Close Combat series, working as a product unit manager, was a producer for the Leisure Suit Larry series, wrote historical text for the game Close Combat III, and even gave his voice to the animated movie Space Quest 4.
Moulder received special thanks from Bungie Studios for his work on Halo: Combat Evolved, but it was never made clear exactly how he contributed to the game's development.