I don't know if this interests anybody, and I've nothing to do with them personally, but I've been aware for a while of a charity called "RedR" who maintain a register of Engineers and other professionals prepared to help (unpaid so far as I know) with disaster relief.
Having a browse in response to an article in Professional Engineering I came across a list of professions they'd like to have on their register
here .
No aeronautics there (not sure why, I'd have thought having a pool of aircraft and airport Engineers able to deploy to the available airports in a disaster area would be quite valuable), but lots of other engineering professions, and clearly worthwile.
Not sure about "mine clearance" though, doesn't sound like a profession with much of a future to me
Just thought I'd share that.
G