Call of Duty: Black Ops 2 only launched last week, but the development cycle just keeps rolling on the franchise and Sledgehammer is currently hiring for a new entry, could it be the heavily rumored Modern Warfare 4?

Sledgehammer Games helped Infinity Ward with the development of Modern Warfare 3 so it stands a good chance that the developers are going to team up again for the next title. An advert posted over on Gamasutra for a Senior Environment Artist reads, “We are actively recruiting top talent for our Call of Duty development team. If you are passionate and driven to do your best work, and have a desire to work on the most successful FPS franchise in the history of video games, please apply online.”

The successful candidate “will be expected to create single player and multi-player levels under the direction of the art director and the creative director,” and “insure that the level works on all relevant platforms, Xbox 360, PS3.”

It’s not really a shock that a new Call of Duty is in development, the major question is what will it be called?