hiya jackAtos is a good place to start your career. their focus is more on technology than the others, although overall they would say that technology is just one part of what they do to help companies work better. kpmg would tend to focus more on financials and cost/efficiency savings, i.e. helping them be better at things they are already doing. Mck focuses on very high level strategy, helping companies to decide things like what to sell and to whom etc. AT Kearney has a very american feel to it in my opinion and they work hard. they get involved in strategy but have had close ties to EDS (a large IT company) in the past. LEK is more strategy like Mck I think, although possibly halfway between Mck and say KPMG. I would say that out of the firms you mention, Atos in my opinion would have the shortest hours and a more relaxed culture. good luck in your career!