Senior engineers? When did it happen to you?

I'm in the middle of hooking up my first legitimately titled 'senior network engineer' role, but I still feel like a noob!

Was there a moment when you felt 'yep I'm good enough now' or did you go through the imposter syndrome stage I'm feeling at the moment?

I've only been in the Industry 2 years, so relatively speaking I do lack experience, but I feel I make up for that in hands on achievements and my ability to learn learn learn.