False. Your prior rank in service does not affect your progression.

There is however a glass ceiling in terms of your job scope/title (as well as unit headcount) as most positions have a DX level cap.

For example, an NS/Media Relations Manager has a DX13 cap while a policy analyst with MINDEF has their ladder all the way up to superscale. While both hire entry-level guys at DX9/10, the progression opportunity is different.