Career Changers - Marketing to Management Consulting

I assume you are talking about how to articulate it for an application to graduate school, not yet articulating it in a cover letter for a job...

I wasn't in marketing, so take this with a grain of salt but.... I think there are many ways to tie it in. The easiest, in my view, is to highlight that, at its core, you are solving problems - likely specific problems, but nonetheless, your job is to look at a situation which is unclear, or for which data may or may not be available, and identify growth strategies.

What makes consumers purchase my product? How can I increase revenues? What strategies will be well recieved by the market and difficult for my competitors to replicate? What sustainable competitive advantages can I develop that will grow my product line faster?

This isn't all that different than what consultants do, consultants just do it on a broader scale - the problem might be people related (eg human capital) or IT related, or financial or product based, but you already have the fundamental building blocks of being a successful consultant - now you need an MBA education to get the other skills necessary - a deeper understanding of HR, finance, strategy, etc.

Anyway, if that doesnt help, tell us why you want to do MC, im sure we can find a nice tie in.

That said, keep in mind that you dont have to prove to the adcom that you would be good at MC.... you only need to show that you are interested and have thought about the career path well.