There is a back door way of gettin into IB, but it's a but of a long shot as all the pieces have to fall into place. Go take your bio/tech credentials to some third world country and do something vaguely humanitarian. It doesn't have to be straight non-profit work, but it needs to be something that can be ostensibly spun into a story about helping poor people.
After you've done that sort of work for a couple of years, apply to top-ten business schools. In your applications, talk about how you want to use your MBA to bring better practices to NGO type activities. Business schools have a certain number of spots for non-traditional do-goosed types. Once you're in, you can pursue whatever you want.
Like I said, it's a long shot, but the upside is that a couple of years spent working third world start ups is itself a great experience. And if you manage to get into a decent business school and don't get an IB summer position, there will be lots of other opportunities available.
After you've done that sort of work for a couple of years, apply to top-ten business schools. In your applications, talk about how you want to use your MBA to bring better practices to NGO type activities. Business schools have a certain number of spots for non-traditional do-goosed types. Once you're in, you can pursue whatever you want.
Like I said, it's a long shot, but the upside is that a couple of years spent working third world start ups is itself a great experience. And if you manage to get into a decent business school and don't get an IB summer position, there will be lots of other opportunities available.