I wouldn't be buying a kerambit for a soldier either. It is a special purpose tool, ie for self defence, and is unlikely to be all that useful for the many chores that will be required of it. Further, for its intended purpose of self defense, it is a fairly non-intuitive tool, requiring plenty of training. A straight bladed knife is not only more intuitive to use, and can be used in a forward grip (unlike a kerambit), allowing more reach. It is also going to be easier to access knife training with a knife in forward grip, especially in the military, where knives are not really encouraged for combat. (Much easier to just shoot the enemy.) By which I mean that there are far more likely to be people around who can train him in forward grip knife fighting. A general purpose knife should have a fairly straight blade, and will be useful for camp chores and, God forbid, if he ever needs it to save his life then it will serve him pretty well there too.
Not having any military experience at all, I can't really recommend anything with authority, but I have always liked the look of the Buck Nighthawk, which is very affordable. I own a Muella Military myself, and find it very handy for camp chores, but it is not full tang. No soldier should own such a knife, since his life may well depend on it being as tough as nails, but I do like the shape of the blade, and it does cut pretty well. Maybe check it out online and look for something with a similar shape, but full tang.
Good luck, numbersman.