Ok, comment wise, I am always looking from a story telling point of view. To push it further, I think about who's looking at this photograph... or rather, who do you want your audience to be when looking at this photo. Could it be the enemy(which will be bad news for you), could it be your pal? Or??
Composition wise, I think it may look more balanced if you have a little more space on the left, just a little.
Texture wise, and this is from my personal desire of what I would want to achieve if I was the one behind the camera, is I really will want to bring out the camouflage and stealth aspects. Perhaps I will compose the photo in such a way that it's actually hard to tell the person from his surrounding apart from his eyes... or something like that. I am all about powerful story telling photos.
BTW, congrats to both your service to your country and your return to being a civilian.