Short story: Abusive, fear and blame culture, with loads of overtime. Run far away.
Long story: They are constantly understaffed because of how terrible they treat their employees so you can expect to work lots of overtime and have mandatory extra days. Note: they keep track of these things so if you draw a line with work-life balance and say no you will never move forward in the company. Management also works obscene hours so it is definitely a top-down problem. They preach that they will never retaliate for you speaking up but I have seen constant retaliation in preferential treatment, not speaking to employees, passing over employees for promotions, and calling employees "stupid" and "unmotivated" when everyone is killing themselves for their job. I would compare it easily to emotional abuse. They will also send you from site to site (about 30 minutes apart) without notice and will not reimburse you for your time and gas.
In order to get a promotion you are graded on how many things you do WRONG in a year- not right. They do not have a culture of learning and support- rather fear and manipulation. They seek to blame you versus actually fix the problem and will frequently make a scapegoat out of you to save their own butts because they are eligible for bonuses- not you.
Managers are promoted because they are the "favorite children" even when they do NOT have the experience, people management skills, or even education to be promoted. If you get in upper management's good graces you will be promoted while the rest of the team struggles. There is not a team attitude here- it's every man for themselves. They are hoping you do something wrong.
People are frequently "let go" without any notice or reason why. This only perpetuates the fear culture and leaves you terrified. If you make an innocent mistake, you will pay for it here, versus other companies that will help you learn & grow.
HR is corrupt and does not look out for you. I saw another review state that HR can be compared to a high school cheer team and I wholeheartedly agree. They watched as leadership told me what I shared was "invalid" and lets management walk all over their employees. The "open-door" policy is really you opening yourself up to be ridiculed by HR and management- they do not take actions. The HR team and management team is extremely unprofessional. I have never felt so torn apart and abused by a job and management that I was working 50-60 hours a week for. It's not worth it.