I imagine Van Ryneveld to be the kind of guy that's part of a certain, more elite cabal inside the mercenary faction, a group of older people that have been working this business for a long time and thus had time to get contacts and so forth: While most mercs would just want to get payed and that's it, he knows that a profitable war is a long war and that the locals can only get you so far in terms of money. Gold mining corporations, foreign governments and so forth being business he and his group of friends deal with so while at the same time he can be an ally and someone that provides contracts, his and our long term interest are ultimately not in common. However it would be a fine line to work as like you said, he could have information from the outside about the Scorpion, some executive from a weapon company giving him a memo about how a shipment of gun has been lost... days before it actually disappears and such shady things.

Could also make a good late game 'Upgraded Enemy', EG a bunch of hardened military trained and equiped merc outfit that collides with our group.

I'll probably make a CS for him later if he stays on a more permanent basis.

And Dutch comes from the fact that when I can the 'Racist from South Africa' is a character that I like to RP. Hilarious stuff in your average High School slice of life. But before that, I learned on the internet.