The ones specifically listed are LEK, Detica and Parthenon, and Monitor, Marakon and OC&C are also noted on a 2x2 chart. You can get the report by following the "Get the Top-Consultant guide to consulting firms" link at the top right of this page - it has a longer list of the smaller firms at the back. If it is the case that your academic background really doesn't look that good on paper, but you've since excelled analytically in a commercial environment, then I really would suggest: emphasizing analytic skills on your CV; highlighting any potentially valuable client contacts you have; and trying the consulting headhunters (the market is very buoyant at the moment). If that still doesn't work - and this really is still what you want to do - an MBA (or at least doing the first step and taking the GMAT) might indeed be the only way; INSEAD only takes 9 months. Alternatively, can't you find some ways to mix in more general and strategic advice on the back of your tax work? Good luck.