Middle years if you go into something like management by the time you're 45, I guess. Though I guess you'd have to have planned out that career switch for over 10 years, in that case...
In most companies if you don't fight actively against it, many times also being seen as not wanting a career at all by others, as most of us get pushed into management.
In most companies if you don't fight actively against it, many times also being seen as not wanting a career at all by others, as most of us get pushed into management.