Indeed, a very nice flesh tone. I'm curious about your technique, because it looks quite like oils...
In addition to Jason's remarks, maybe add a bit more contrast in the deep shadows: folds around the nose, eye sockets and below the lower lip. The latter will make him look even more tough I think.
I look forward to your progress. I'd recommend that you try and avoid the glossy finish for the uniform. If you have any trouble with that, just add a bit of Tamiya X21 (matt varnish) to every colour mix.
Cheers,
Adrian