Pros
The best thing about this environment is that nearly everyone is a new graduate, so you will have a lot of young colleagues. They also have a lot of foreign language busy work and will hire a lot of non-Americans, allowing foreign exchange students to stay after graduation.
Cons
Where to start... this is simply the most toxic I've ever worked and I'm reminded of some specific signs. For one, the Glassdoor page was a common topic of conversation with my coworker's manager. And it seems like the Reston location has combined its Glassdoor page with other locations to help pad their stats. I remember there was an empty desk filled nametags of former employees which had left or had been fired, which was affectionately called the "graveyard." Nearly everyone that was Senior Associate and under was waiting for a conditional hire with the government to get out. And many others who have stuck around, just weren't able to get into the government for whatever reason or other. The environment, I remember, was very stressful. The entire floor is so quiet because the workload for low-level, uninteresting reports is non-stop. And you won't really receive much in terms of mentorship, other than referrals to templates. Conversely, you will get reported to higher-ups for fixable mistakes. I remember having some good colleagues that were waiting everyday on their next opportunity--I hope that they are doing okay.