Having worked with that agency, they have a fair number of people who don't directly have much to do with the nuclear weapons enterprise at all. Those include their social media team, recruiters who try to push going into the weapons community, and the like. There are also the normal administrative paper-pushers that flourish in Federal and state agencies.
Getting rid of some of those people seems like a bad idea when NNSA is a black box that says "scary nukes here", but really isn't once you look inside a little bit. The job of recruiting people should be left to the companies that run the Labs. We don't need a social media team to publicize a statutorily-required agency. We could probably prune a bunch of admins and have little impact on the enterprise after a little bit of shakeup. Etc.