Pros
The contracts they engage in often center around meaningful development work
Cons
Poor benefits - high deductible plans cover little if anything. Their raise and promotion process lacks transparency and structure and each contract has a maximum allotment for promotions so you might be here a long time without a substantial raise or promotion. No equity adjustment is available for those who are out of the salary range for their position - and ICF said they would not initiate to move someone up into an appropriate salary range. If you're working for a contract that they keep winning every few years - chances are they didn't structure your contract for longevity and there is little professional development or opportunity to move up (or even sideways).