Management consultants are brought in by organizations to provide advice and solutions for complex business problems. Many strategy/management consulting firms focus on issues of strategic importance (i.e. focusing on what needs to be done rather than how it will be done). Other firms focus on the implementation and deployment of solutions. In either role, consultants aim to provide an objective perspective using their excellent analytical skills. (Read more at Wikipedia)
Sign up an account on caseinterview.com by Victor Cheng (a former Mckinsey case interviewer), and you will receive emails discussing more about this career.