EconGirl,
I don't want to be mean but the multilateral institutions you are targeting might not be the best place to work for post-MBA.
The survey from Vault on IFC/WB reveal that intra-company politics are very strong. From what I hear from my friends here in the Phil. govt., politics are very strong in here or in Washington.
One survey was very revealing, "if you want to do a lot of *ss kissing, go to WB..."
My LT plan is to go back and work for the Phil. govt. However, post-MBA I need to make my money so that I can walk away from my job anytime--my boss calls this f*ck you money. This way, you can tell anyone to f*ck off and walk away if they are asking you to do something unethical.
I think it would be better for you to join an IB that is interested in the BRIC countries. Work with the IB for a few years then transition to a multilateral after you make your money.
Just my two cents...