😯
For better or worse, your performance is tied to your boss's performance so you could be vulnerable if your boss is transferred, fired, demoted, or forced to retire.
Getting "layered" — when the company moves someone new between you and your boss — is also cause for concern. The same goes for when you're assigned a new boss who's been hired from outside the company: New managers often want to recruit a new team.
Also watch for signs about how your superiors are perceiving your individual performance. If you're getting feedback that's more critical than usual, it could be because your boss is under pressure to force rank employees. If you're getting moved off key assignments or given legacy work — being assigned to older products or doing maintenance on systems — it could mean that you're not seen as driving the future growth of the company.
Feeling isolated, out of the loop, and being left off emails are bad signs. You would have been included if you were important enough. Or it could mean that they want you to fail, and they want to justify that you aren't valuable.