A Steward (VRMS) knows one world from every side and, over the years, becomes one of the people it relies on most.
The roles change, sometimes completely, often because the place needs someone in a new role and the Steward takes it on. Their world, their work environment, stays the same, so what the Steward learns about its people, its history and its unwritten rules carries over into the next role.
A chemistry teacher who became head of year, then ran the school’s finances, then became its head, all at one school, has not started over each time. Each move gave a new view of the same school. The one world need not be a single employer, though. It can as well be a town, an industry or a profession, as long as its people and its rules stay familiar.
Stewards also push for mastery. They keep improving how the work is done after it is already done well, and in at least one area they become the person colleagues come to for answers.
That combination takes years to build, and it is built in one world. A Steward’s range and depth are worth most inside the world that saw them grow, and noticeably less outside it.