There may come a point in a career when you have maxed out your original field. Maybe you are a chief executive who no longer wants the seat, or a specialist who has gone as far as the specialism goes. The question is not whether to change. It is how to change without throwing away thirty years of accumulated value.
Is it too late to change direction at this level?
No, and the assumption that it is comes from thinking about a career change as starting over. Senior people almost never start over. They redeploy. The skills that got you here, judgement, running people, making decisions with incomplete information, holding accountability, are the scarcest things in any organisation and they are not industry specific.
What does not transfer is the vocabulary. That is a communication problem, not a capability problem, and it is solvable.
Start with what you actually want to stop doing
Most people approach a change by asking what they want to do next and freeze, because the honest answer is that they do not know yet. A better first question is what you want to stop doing. That is usually easy to answer and it narrows the field fast.
If the answer is the commute, that is a geography problem. If it is the politics, that is an organisation size and culture problem. If it is the actual work, that is a genuine field change. Those three lead to completely different searches, and confusing them wastes months.
Find the through line before you tell anyone
Every strong career-change story has a constant running through it, usually a specific class of problem the person is repeatedly hired to solve. Turning around an underperforming unit. Scaling an operation past a breaking point. Rebuilding a team after a merger.
Told as a sequence of industries, a varied career reads as drift. Told through the constant, the same career reads as range. The facts do not change. Which one a hiring executive hears depends entirely on whether you have identified the through line before you start talking.
Test before you commit
You do not have to resign to find out. Conversations with people already doing the thing, advisory or board work, a project in an adjacent function inside your current company: all of these are real information at low cost. Most people skip this and go straight from dissatisfaction to a decision, which is how second careers turn into third careers three years later.
What actually changes in the search
Two things. Your network becomes more important than your resume, because you are asking people to see you as something your history does not obviously say. And the burden of translation is entirely yours. Nobody on the other side will do the work of imagining you in a different context, so the documents and the way you introduce yourself have to do it for them.
That is the whole job of a career campaign at this stage: making a change that is obvious to you also obvious to someone who has known you for ninety seconds.