Lawyers who are thinking of switching to a management role at a firm have some advantages over non-lawyers. Presumably, they understand how lawyers think, how work gets done and how to best serve clients. But management requires a set of skills that is very different than the skills required to be a good lawyer. For starters, managing requires a focus on the big picture while much of lawyering requires a strong focus on the big picture. In working on a deal or a case, there is generally a beginning, a middle and an end. Managing people is much more open ended. For more on the subject, there is a very good article on Law.com.