HiI've worked at both PA and ATK, and would advise you to pick ATK.PA seems to have a lot of dissatisfied staff at the moment. The business model makes a lot of money for people at the top, not always cascaded down. Base salaries at PA are lower than ATK and PA put a lot of weight on bonuses that don't always materialise. PA in London also do a lot of government work, even if you are in other practices you can get stuck on these projects for a long time. However on the plus side, PA is a friendly, almost collegiate place to work with a mix of people from different backgrounds. PA expects you to perform to get the big bonuses, but it is also less of an 'up or out culture'. there is flexibility to work across practices and also to get involved where you are interested if you push.ATK - has better brand name than PA which gets them in to more interesting clients at a higher level for projects. I'd be interested in what the performance culture and measures are there since the MBO. Base salaries used to be at higher end of consultancies but not so much focus on bonus. Definitely a 'grow or go' culture (ie up or out). Take on lots of MBA grads compared to PA. Expected to learn fast even if you haven't had prior consulting experience. Bright bunch of colleagues. Higher pressure than working at PA. ATK had started doing more government work too, but you might want to check since MBO (and split from EDS) whether they do less of this.Good luck with your new job !