The Shield ebook cover

Hier ist was ein Geschäft in United States für sein eBook cover design vorgenommen hatte.

I'm looking for a high quality book cover replacement for a published Kindle ebook called The Shield. Here is a link to the current cover on Amazon's site:

http://www.amazon.com/dp/B007SPD16A

Genre: military science fiction.

As you can see, it's an amateur cover and needs to be improved.
If you read the book description on the Amazon website, you get a fairly good idea of the gist of the book and the main character, Grayson.
I would like to see the following minimum things incorporated into a new cover:
1. Grayson himself is portrayed, but you can't see his face to maintain mystery.
2. He is wearing his black combat armor (flex armor)***important! Think batman in The Dark Knight Returns without the mask or other batman stuff. Just black body armor.
3. There's an emblem on his shoulder (cross with a circle) that is his badge of office and should be on his armor somewhere.
4. No aliens on the cover!
5. The author's name (Peter … Mehr lesen