From Vox Games:

Robert Bowling, the Call of Duty creative strategist more commonly known by his handle “FourZeroTwo,” is vacating his position and leaving both Infinity Ward and Activision-at-large, he announced on Twitter earlier today.

Bowling served as both creative strategist and community manager for the studio and Call of Duty brand since 2006, and has been one of the most recognizable members of the company since the departure of studio heads Jason West and Vince Zampella in 2010. He’s been the game’s biggest champion and most efficient source of info distribution through social media channels — most notably, he carries a cache of 366 thousand followers on Twitter.