Not sure if this is just an AF thing - I'm pretty certain the Navy has lots of "post-Command" and "non-Command" only jobs.
Related: Even on the JO level, the follow on jobs after one's first operational (sea) tour have an order of precedence based largely on how your career is tracking. This, in and of itself isn't necessarily a problem. But, then those jobs have follow on jobs (second sea tours, third overall) that are only available to the people that were in select (first shore tour, second tour overall) jobs - again, not necessarily bad. Where I have a problem with it is that we have a bit of a quality spread to select people for those (first shore / second overall tours), and also take into account issues like co-location, gender (and presumably race) diversity into these jobs as well, which means that someone can do everything right, but get a second tier job and the ripple effects for the outcome of their career are astounding. I.e.: LT X gets selected for the FRS, and the world is that LT's oyster for follow on orders. LT Y (who performed equally as well or better as LT X did) was selected as "the quality" for a second tier job, but regardless of how well LT Y does at that second tier job, will unofficially be shuttered from being able to select CAG (airwing) Staff, Assistant Navigator, and plenty of other "top tier" second sea tour (third overall tour) jobs. This system probably worked OK in the past when it was quality self-selecting quality, but with a quality spread in the mix, it by necessity means that plenty of the top people will have glass ceilings in their career as a result of what job they were selected for on their very first shore tour (second tour overall).