Almost everything. Take careful note of the critical reviews on here since they paint a more accurate portrayal of culture and leadership. It looks like management is trying hard to flood this page with fake, positive reviews so figured I'd add my two-cents.
The truth is I've never seen a more callous and unprofessional environment in my life. I can't speak for the other organizations in the network, but the development office is rotten to the core. There are serious leadership issues and it seems like HR doesn't have a real role to play other than doing what they're told by those in power.
MBM culture does not apply. The principles are weaponized against good, honest employees and it's disturbing the way leadership dehumanizes those beneath them. They wield power in the most unethical ways I've seen in a professional, social, or personal setting.
There are stories of past employees trying to raise these concerns to the very top levels (trying to reach Koch Industries). However, most people seem to be bullied, silenced, or pushed out until the problem goes away. Only to have those in leadership continue the same conveyer belt of callous, dehumanizing behavior.
There is SERIOUS turnover in the development office and that is a fact. I've seen full teams decimated in the matter of weeks. This happens for a number of reasons. People get bullied until they leave or leadership finds a way to get rid of them. Some get fed up with the culture and last as long as it takes until they have another job secured. Some leave with nothing else lined up because the culture is just that bad.
No matter what management says, this is the truth and glossing over it with false pretenses of "change" and "restructuring" doesn't hide these issues. On the contrary, it makes them even more obvious to the average employee.