The organization has strayed too far from its original mission of making the United Stated energy independent. The maze of lab and contractor-managed (controlled) sites makes it nearly impossible to implement agency-wide change. It is more akin to each site being its own organization with only a conceptual tether to HQ. They are nearly, some more than others, autonomous. If someone can come in and focus only on their little task, they'll be fine. If they depend on anyone outside their work group, they'll be miserable.
The work life balance is good, possibly too much so. It is not uncommon for anything to be more important than actual work. CFC, Award Ceremonies and the like must be attended, but little thought is given to actual work. The procurement processes are Rube Goldberg machines, so if you work in an operation which requires consumables, you will likely end up with equipment you cannot use for long periods.
The orange chicken in the cafeteria is first rate.
Poor SES corps in some operations.