Universities in Geneva

I am looking to do a Masters degree in either Business Administration, Finance or something that has do to with humanitarian work. Can't really give more details, since I myself still do not really know what it is I want to do in life. Can anyone suggest a good uni here in Geneva, I don't know how ranking works over here, or which school is known for what. Any advice would be appreciated.

If anyone is currently working at the UN or other humanitarian organisations, I would truly appreciate it if you could suggest which courses or studies I should take.

Desperately need some help!

Thanks,
Shei