Agree with Schools Div, a lot of high flyers who are not necessarily prestige scholars strategically go to SD to become Special Assistants. It's a good place to network with Cluster Supts and school leaders, and generally make yourself known .. if you do good work and manage to stand out amongst the go-getters.

CPDD and other Professional Wing divisions.. not so much, tbh. Yes, it's true that pretty much any HQ posting will prepare you in some way for taking up higher appt in schools, but you will still somewhat lack a broad policy view if you are working mainly in curriculum subject teams.