Pros
Front seat to global economic policy work, diverse staff, good benefits relative to traditional US firms. Management is trying hard to work on diversity within the institution but it's a stubborn and risk-averse work force. It's a very lean organization at the bottom but very heavy at the top. So there is no shortage of work or opportunity but this has significant downsides.
Cons
Glass ceilings: : graduate education, education pedigree, nationality, gender, and especially age - if you're young and haven't done graduate studies yet, don't stick around. Sink or swim culture - and proud of it. Very traditional/regressive culture: women need to talk passively and persuasively to be heard, young people (anyone under 40 is called young - under 30 you are treated as a child) are expected and are sometimes told to just sit and listen, a substantive amount are homophobic, and how well you speak and persuade often times matters more than your actual ideas - and this hurts you if you are not a native/fluent English speaker and/or do not speak up for yourself confidently. Worst of all - it is the most hierarchical place I've ever seen.