Those "mercenary" type jobs are pretty risky. Like everyone is suggesting, look into it and know what you're getting into. A year is a hell of a lot longer if you're spending everyday with your life on the line. I've always seen those companies as a bit sketchy sometimes. I question whether they make the situation better or worst by making what they do a business.

It depends on what they're doing really. They can make the situation better... but it really depends on the quality and commitment of the company.

I suppose if you already know what the risk is and that you have satisifactory life insurance or cover incase the "worst" happens and that you ok with it then I don't see why you shouldn't do it!

If you have a family etc then I wouldn't do it but if your single and nothing to attach you to this life if you never come back then do it