Kay,Apply the rigour that you would apply to an MBA case study to your own situation!You are describing the symptoms of your ennui without getting to the source of the problem. Start from the beginning and describe exactly what makes you unhappy and what would make you happy.• If I was fed up not being billable, but enjoyed the work when I was billable, then I would apply for other consulting jobs at more commercially successful firms (or I could help win more work at my current firm).• If I was regularly billable, but found the work that the firm wins boring, then I’d look for a job at a firm that specialises in work that I find more interesting (or I could launch my own practise area at my current firm)• If I was unfulfilled even when regularly billable and on interesting work (e.g. because I felt isolated from ownership of the work) then I would consider giving up consulting and taking a job at a “client” company where I would own the issues rather than just advise on them.• If my firm had some interesting work that I would gladly do, and would find fulfilling, but I was consistently not being invited onto those projects, then I would have to consider whether that was down to my performance/ability.When things are not going well, it can often seem like you have a multitude of problems, when really you have just one major problem and a whole bunch of symptoms.Are you really fed up with consulting as a career? Or are you simply at the wrong firm? Are you a capable person at an underachieving firm? Are you underachieving at a perfectly reasonable firm?The action you should take depends on the answers to all these questions.