Originally Posted by yaustar
Concept artist roles are very rare for games companies. We only have a few despite having ~200 developers on our floor.
In additional to the advice above, your art that you have shown so far has only one theme. You will need to be much more flexible to increase your chances.
Unless you want to work on Clive Barker's Jericho 2
(Although, I suspect Clive Barker himself does the concept art for the games, as he did the art for his action figures, and a couple of his movies.)