During his 11 years at Nintendo, Reed served in many key programming roles, including technical lead on NST's Metroid Prime: Hunters (NDS) and main system programmer on Nintendo EAD's Pikmin (GCN).
Reed will be joining the team at Microsoft responsible for the racing-sim series Forza Motorsport, which is headed up by internal studio Turn 10. Prior to his departure, he was working with NST on an undisclosed project.
His resignation marks the latest high-profile departure from Nintendo. In late April, Metroid Prime series developer and wholly-owned Nintendo subsidiary Retro Studios lost three pivotal staff members.