its the law of the jungle I'm afraid. If you have been mediocre and keep getting a 3 in your perf review you may be at risk. If your a 2 your out IMO. The management teams will stack rank their employees. The directors will stack rank the managers and so on.
They need to trim the company down a bit. The growth they once has slowed considerably. They focus now in NSBU so you should be fine there. However they have hired way too many directors and VPs and that will be hurting the margins. I would focus back to basics. Increase the manager coverage to min of 10-12 reports. That way you get rid of the management fat. It's the good troops in the field that make the diff.