Level design
To be a successful designer you would need a tremendous traditional art or architectural experience, and a tremendous frame rate, game flow and pacing experience You need both qualities to do good in level design. A digital architect is a dedicated individual who spends their time creating and developing levels. These architects have good artistic skills, traditional art, architectural, frame rate, game flow and pacing experience. With Moore’s law in place the future of digital architects will keep changing, more and more architects will be required in order to create levels in time. Moore’s law says that processor speed doubles every eighteen months and 3d accelerators constantly get better. More digital architects will be needed for each level because of the huge size and graphical mass, games are getting better and better. A level designer is sometimes thought of as a chef or is likened to glue. The chef part is that the level designer will take ingredients (bits) from other talented people and mix them together while sticking to the recipe (the plan) of a design document.As for the glue part of a level designer this all down to how important the level designer is. Designers have become one of the most important members of developing teams, this is because they take parts, textures, ideas, characters and have to plan out where things are placed and what things are used.The designer has to shape his level around the ideas and work he has from other people.
http://www.cliffyb.com/art-sci-ld.html(information on whats needed for a level designer)