The assets you used (CADs and Brushes and whatnot) does not fit the render at all. Also the light red-ish gradient over the image should be changed, it destroys your contrast at the bottom of the image. I mean look at your skin tones, at the top it is an orangish-tan, but at the bottom it is completely red, almost purple, it just seems wrong.
Typography I can't really complain about too much, except it is more pleasing to the eye to make larger text on top and smaller text near the bottom, and some text you may want to just leave out (most sigs just have a one liner, or a name, not both + credits).
Lastly, using facebook as your image source is just a bad idea. Get puu.sh or upload it to a host that doesnt ruin image quality of the image. Imgur, for example, does not change the image unless it exceeds 1MB, other services do similar.
