This is pretty good, and it looks like it go into Warframe.
But, I feel like you could make this picture more realistic, perhaps by changing the angle of the character, or making him more symmetrical (The arm lengths and leg shapes are different).
Not trying to be critical, perhaps this is just a doodle? I'm not too sure. However, a lot of your art is pretty good! You have some really good character concepts, and I can't wait to see what your pictures will look like once they're colored!