Originally Posted by merkur
This is actually a pretty common route to MBB.
As mentioned before, McKinsey is the leader in recruiting non-traditional human capital into their practice. They feel it diversifies and broadens their skills as a consulting company. They like the applicant who isn't fed the spoon of the traditional B-school; they like the applicant that can be molded and developed within McKinsey. In this sense, your friend won't be put at a disadvantage
with his background.
With that said, MBB are already hard enough to land as it is. Your friend will probably be gunning for a baseline analyst position, and needs to be comfortable working hard to ascend the ranks. This is not even considering if he is even capable of management consulting. How did he decide on consulting anyways?
I would suggest him to volunteer or get an "in" somewhere at a smaller, boutique firm. This will go a long way in showing he is committed to the industry, develop the skills and mindset of a consultant and whether he even likes it or not. Who knows, if he wants to back out of it, he can then get his MBA and segway that way into the business world. If you're working with any of the top 10's, you got it pretty good, ie: Deloitte etc.
Hope this helps!