Pros
UNAVCO is very well respected by the science community. The science areas supported by UNAVCO are cutting edge and are growing. The environment is more academic then business, providing a more relaxed working environment. Jobs seem to be fairly stable since funding is in 5 year cycles. Benefits are very competitive, while compensation is a bit lower than similar types of science supported Government funded organizations. A good way stop in one's path toward a PhD.
Cons
External appearances are misleading. Management is old styled and non-supportive of current management practices (collaboration, transparency, inclusiveness, communication). With the new president some of these issues are being addressed; time will tell. The organization is fairly flat which also means career opportunities (promotions) are limited (so this is a positive and negative). HR is rudimentary and not always competent.