SC....
Yes... just about every contract company operating out of South Africa...
On the down side you would have to have either an SA licence or an SA rating, something you're unlikely to get sponsored for... just too many SA pilots out there needing work... You could pay for it yourself but without a guarrantee of a job I wouldn't suggest it...
As for the tree hugging bit, you'll be disappointed... it's not taking food to the starving in refugee camps... at least thta's a miniscule part of it that the majority never experience... for the most part you'll be driving around grossly overpaid, self-important administrators on huge UN per-diems... some contracts are more rewarding than others ( in the humanitarian sense )... how much good any of it does and the reasons behind the international aid work by various countries will keep us arguing for the duration of the contract. Just accept that the private companies are there to make money and the NGO's..(not just Airserv) exist primarily just to continue existing.
If you have any church affiliations you could approach PACTEC or MAF... but you'll need to find sponsorship... no salaries involved.
One suggestion... you might reconsider the Pseudonym you've chosen..