A CG artist's work usually revolves around finding balance between artistic sensibilities and technical limitations while working within a development team.
CG artists (typically, technical artists) will also work with game programmers to ensure that the 3D models and assets created by the art team function as desired inside a game engine.
CG artists are typically skilled at creating both 2D and 3D digital art, and often specialize in one or more subsets of content creation such as: hard surface modeling, organic modelling, concept art painting, architectural rendering, animation, and/or visual effects.
If the CG artist is a technical artist, they will usually also have programming skills such as shader and script writing, character rigging, and/or skill in languages such as Python, MEL, C++, or C#.
[1] CG artists often begin their career with a degree from an animation school, an arts discipline, or in computer science.