difficult question really. For strategy your lookign at the likes of Bain, Mck, BCG, BAH, Roland Berger (not in any specific order, and there are others some people might include, that work in particular industries). IT wise you again have specific ones, but also smaller ones who specialise in a particular form of IT. Regardless, with all, there is an argument of where you fit the full house firms in. i.e. Deloitte, PA, ACN, CAPG. Also may depend on how ones views the quality of public to private sector work? Im interested though to see what people think.