well said south coast,
we're in the wrong biznes! try to get into the UN direct and pretend to 'help' the helpless while making looooots of money. humanitatian work as i've seen is a extremely hypocrite thing. it took me a few years to realise that. me to i always wanted to fly UN, Red Cross, .... did it... and now i prefer flying for the bad guys: oil companies, at least they are clear about what they do.
but its maybe good to go find out yourself: like contract dog said: apply to all those listed in his post. after flying humanitarian these same companies can offer you jobs for the bad multinationals and alike
cheers,
MD