I decided to dig down the rabbit hole a bit, and the chasm that exist between NWS and the FAA is kind of wild.
Currently, the FAA has full-time meteorologists based at 21 "Air Route Traffic Control Centers," in addition to a huge team of contracted weather observers at first order airports across the country. This wasn't even a universal thing until a terrible incident in the early 1980s in which an airplane nearly crashed due to damage from an unexpected t'storm.
In essence, the FAA doesn't believe weather observing is a core tenant of its responsibilities (which, in all fairness, it wasn't prior to the early 1980s), so they treat it like a red-headed stepchild. The FAA and NWS will publicly call it a "partnership" to save face, but it's a really lopsided relationship with the FAA being the hostile party, as they have been increasingly uncooperative with the NWS who just wants to ensure they're getting quality observations. In fact, back in 2013 as part of the sequestration (as I'm sure some remember), not only did the FAA bar the NWS from training/monitoring their weather observers or even forcing the contractors to take outside observations, but the FAA was pretty damn close to eliminating dedicated weather observer positions for 1st order sites entirely (fortunately, this was stopped in the 11th hour). The "duties", had that happened, would have been picked up as an after thought by the air traffic controllers who generally have no formal education/certifications in meteorology.
To this day, the FAA continues to push for phasing out / eliminating contract weather observers and even their full-time meteorologists, although this still has yet to come to fruition. To them (the FAA), these positions are seen as low-hanging fruit for reducing expenses given its own budget constraints.
As has been made apparent, the NWS over time has become disillusioned/frustrated about this arrangement, for all the good reasons mentioned above. That why for some of the more detail-oriented observations that don't require dedicated headcount (such as snow measuring), many branches have opted to pay a stipend to civilians who they train and who use proper equipment (which the FAA doesn't necessarily do).