How do you actually collaborate/interact proactively with business?

Summary

So, I recently started at a new company. Respectable revenue and size but not very data mature. We have dashboards and data warehousing sure. The problem just is we know there's a million excel data siloes in the company and a lot of folk just exporting and doing their own 'analysis'. I've been in the business far enough to know that is just business as usual, but we are starting to implement some kind of a collaboration model to weed out these issues. It might be 'data champions' or it be ju...