I know the EE & ME worlds, senior generally implies at least two decades of experience. I'm pretty sure the same is also true for civil engineering, and most of the other "hard" engineering practices.
It seems like (at least outside of the military) the duration to being senior and the importance of things not going wrong are correlated.
It seems like (at least outside of the military) the duration to being senior and the importance of things not going wrong are correlated.