The environment is very political and heavily charged. Be ready to take a stance at every level. If you're not ready to step into the bull pen to fight for what you need or the direction you feel is necessary be ready to step back and take direction from those that may not have the knowledge and experience but do have a louder voice.
The environment, among other things, lacks a professional atmosphere. Corporate policies are loose and the team dynamic is aggressive. Going into the environment you need to be prepared to achieve at all costs.
The org lacks internal documentation, training, policy and procedure. Be prepared for micromanagement at numerous levels.
There are no departmental boundaries or organizational feedback cycles. If you've made a mistake you will hear about it from numerous individuals on numerous teams.
Errors in process or procedure are readily identified - errors are seen as weakness at the individual level and not something that is addressed after an actual gap analysis. The environment lacks actual tooling to streamline request cycles and workloads.
HR is visibly not working to balance the leadership/ employee relationship or push leadership for the necessary resources to better enable the employee. If you take a complaint to HR be prepared to be managed out -- all of your mistakes no matter how minute will lead to administrative action that will eventually lead to your termination. HR does aggressively fight unemployment with as many roadblocks as they can muster.