There is a chance that you'll have a boss who makes you want to leave - I feel like I hear more stories about good bosses than ones who make people want to leave.
The company is process and systems poor. The company grew into its current form through a bunch of mergers and acquisitions (M&A), and leadership is still trying to cobble together these different (sometimes seemingly semi-autonomous) companies into a single group, led by the corporate strategy.
So, if coming from a systems/process rich company, get ready for some big efficiency reductions from your systems limitations, expect inconsistencies b/c of lacking process uniformity, and be prepared to embrace Dean Foods' #1 ERP system: Excel.
Since the corporate office is relatively small, there's a good chance that nobody else knows how to do all your job. So, it's hard to 'turn off' from work even when on vacation and when you/one of your counterparts leave for vacation (or for another job), your (likely small) team is left trying to pick up the pieces and fit your full-time job into their already over-loaded plates.
There is horrible turnover. On the bright side this might result in more lateral/upward mobility than at a company where people never leave?
The fluid milk category accounts for the vast majority of DF's revenue, and the category is shrinking ~2% YOY. So, don't expect any exciting, breakneck growth.
DF's performance depends significantly on the commodity cycle. Depending on commodities in year 1 you might have a record-breaking bonus and in years 2 and year 3 you'll just be glad that your job wasn't out-sourced or eliminated.
Literally 0 paternity leave. Starting out there is just 15 days for sick leave, family leave, and vacation.
Hopefully it's the right thing to do to get the company thriving again, but leadership is making a lot of unpopular decisions currently - closing plants, out-sourcing functions, making lay-offs, placing hiring freezes, kicking spouses off the insurance if their employer provides insurance, etc. I don't feel like they're being open and honest enough with employees about these decisions.